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Journal articles on the topic 'Dipolar systems'

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Author: Grafiati

Published: 10 March 2023

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1

Downing, Charles A., and Luis Martín-Moreno. "Polaritonic Tamm states induced by cavity photons." Nanophotonics 10, no. 1 (September 14, 2020): 513–21. http://dx.doi.org/10.1515/nanoph-2020-0370.

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AbstractWe consider a periodic chain of oscillating dipoles, interacting via long-range dipole–dipole interactions, embedded inside a cuboid cavity waveguide. We show that the mixing between the dipolar excitations and cavity photons into polaritons can lead to the appearance of new states localized at the ends of the dipolar chain, which are reminiscent of Tamm surface states found in electronic systems. A crucial requirement for the formation of polaritonic Tamm states is that the cavity cross section is above a critical size. Above this threshold, the degree of localization of the Tamm states is highly dependent on the cavity size since their participation ratio scales linearly with the cavity cross-sectional area. Our findings may be important for quantum confinement effects in one-dimensional systems with strong light–matter coupling.

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2

Nagy, Sándor. "The frequency of the two lowest energies of interaction in dipolar hard sphere systems." Analecta Technica Szegedinensia 14, no. 2 (December 8, 2020): 13–18. http://dx.doi.org/10.14232/analecta.2020.2.13-18.

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This publication was inspired by the study of chaining in dipolar systems. Two adjacent particles form a chain is usually decided by energy or distance criterion. This prompted the author to investigate the frequency of interaction energy between nearby chain-forming particles in the dipolar system. So what is the frequency of the two lowest energies. Does have raison d’etre of the energy-based chaining criterion? Because if so, in the frequency chart qualitative change should have see at 70-75%, compared to the lowest possible energy. No such qualitative change was observed in the computer simulations. Monte Carlo simulations were performed at many densities and dipole moments in a dipolar hard sphere system. The simulation results were theoretically interpreted using the Boltzmann distribution The theoretical relationship was generalized to a wide range of density and dipole moments by fitting three suitable parameters. The fitting was necessary due to the compressive effect of density.

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3

Chan, Chin Han, and Hans-Werner Kammer. "Characterization of polymer electrolytes by dielectric response using electrochemical impedance spectroscopy." Pure and Applied Chemistry 90, no. 6 (June 27, 2018): 939–53. http://dx.doi.org/10.1515/pac-2017-0911.

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Abstract Authors present a phenomenological view on dielectric relaxation in polymer electrolytes, which is monitored by electrochemical impedance spectroscopy. Molecular interaction of polymer chains with salt molecules (or dipole-dipole interaction between segments and salt molecules) leads to dipolar molecular entities. Frequency-dependant impedance spectra are the key quantities of the interest for determination of electric properties of materials and their interfaces with conducting electrodes. Salt concentration serves as parameter. Bulk and interfacial properties of the samples are discussed in terms of impedance (Z*) and modulus (M*) spectra. We focus on two different classes of systems, i.e. high molar mass of poly(ethylene oxide) (PEO)+lithium perchlorate (LiClO4) (i.e. the inorganic salt) and epoxidized natural rubber (ENR-25) with 25 mol% of epoxide content+LiClO4. Impedance spectra with salt content as parameter tell us that we have interaction between dipolar entities leading to dispersion of relaxation times. However, as scaling relations show, dispersion of relaxation times does not depend on salt content in the PEO system. The relaxation peak for the imaginary part of electric modulus (M″) provides information on long-range motion of dipoles. Summarizing the results from imaginary part of impedance spectrum (Z″), tan δ (imaginary/real of permittivities) and M″ for the two systems under the discussion, PEO behaves like a mixture of chains with dipoles. There are interactions between the dipoles, but they are relaxing individually. Therefore, we see PEO-salt system as a polymer electrolyte where only a tiny fraction of added salt molecules becomes electrically active in promoting conductance. However, ENR-25-salt system behaves just as a macroscopic dipole and it can not display electrode polarization or electric relaxation because there is no mobility of individual dipoles. Hence, ENR-25-salt does not form a polymer electrolyte in the classic sense.

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4

Höhr, T., P. Pendzig, W. Dieterich, and P. Maass. "Dynamics of disordered dipolar systems." Physical Chemistry Chemical Physics 4, no. 14 (May 30, 2002): 3168–72. http://dx.doi.org/10.1039/b110484e.

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5

Fujiki, N. M., K. De’Bell, and D. J. W. Geldart. "Lattice sums for dipolar systems." Physical Review B 36, no. 16 (December 1, 1987): 8512–16. http://dx.doi.org/10.1103/physrevb.36.8512.

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6

Yukalov, V. I. "Dipolar and spinor bosonic systems." Laser Physics 28, no. 5 (April 11, 2018): 053001. http://dx.doi.org/10.1088/1555-6611/aa9150.

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7

Würger, Alois. "Tunneling systems with dipolar interactions." Physica B: Condensed Matter 263-264 (March 1999): 253–57. http://dx.doi.org/10.1016/s0921-4526(98)01225-3.

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8

Armstrong, J. R., N. T. Zinner, D. V. Fedorov, and A. S. Jensen. "Thermodynamics of Dipolar Chain Systems." Few-Body Systems 54, no. 5-6 (July 28, 2012): 605–18. http://dx.doi.org/10.1007/s00601-012-0474-3.

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9

Raynaud, R., L. Petitdemange, and E. Dormy. "Dipolar dynamos in stratified systems." Monthly Notices of the Royal Astronomical Society 448, no. 3 (February 25, 2015): 2055–65. http://dx.doi.org/10.1093/mnras/stv122.

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10

Torres, A., J. Jimenez, B. Vega, and J. A. de Saja. "Non-Debye Behavior of Dipolar Relaxation in Systems with Dipolar Interaction." IEEE Transactions on Electrical Insulation EI-21, no. 3 (June 1986): 395–98. http://dx.doi.org/10.1109/tei.1986.349082.

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11

Kutteh, Ramzi, and John B. Nicholas. "Implementing the cell multipole method for dipolar and charged dipolar systems." Computer Physics Communications 86, no. 3 (May 1995): 236–54. http://dx.doi.org/10.1016/0010-4655(94)00020-3.

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12

Ames, Benedikt, Edoardo G. Carnio, Vyacheslav N. Shatokhin, and Andreas Buchleitner. "Theory of multiple quantum coherence signals in dilute thermal gases." New Journal of Physics 24, no. 1 (January 1, 2022): 013024. http://dx.doi.org/10.1088/1367-2630/ac4054.

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Abstract Manifestations of dipole–dipole interactions in dilute thermal gases are difficult to sense because of strong inhomogeneous broadening. Recent experiments reported signatures of such interactions in fluorescence detection-based measurements of multiple quantum coherence (MQC) signals, with many characteristic features hitherto unexplained. We develop an original open quantum systems theory of MQC in dilute thermal gases, which allows us to resolve this conundrum. Our theory accounts for the vector character of the atomic dipoles as well as for driving laser pulses of arbitrary strength, includes the far-field coupling between the dipoles, which prevails in dilute ensembles, and effectively incorporates atomic motion via a disorder average. We show that collective decay processes—which were ignored in previous treatments employing the electrostatic form of dipolar interactions—play a key role in the emergence of MQC signals.

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13

Levesque. "New solid phase of dipolar systems." Condensed Matter Physics 20, no. 3 (September 2017): 33601. http://dx.doi.org/10.5488/cmp.20.33601.

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14

Sutcliffe, Oliver B., Richard C. Storr, Thomas L. Gilchrist, Paul Rafferty, and Andrew P. A. Crew. "Azafulvenium methides: new extended dipolar systems." Chemical Communications, no. 8 (2000): 675–76. http://dx.doi.org/10.1039/b001521k.

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15

Nattermann, T. "Dipolar interaction in random-field systems." Journal of Physics A: Mathematical and General 21, no. 12 (June 21, 1988): L645—L649. http://dx.doi.org/10.1088/0305-4470/21/12/005.

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16

Scheffler, F., P. Maass, J. Roth, and H. Stark. "Quasicrystalline order in binary dipolar systems." European Physical Journal B 42, no. 1 (November 2004): 85–94. http://dx.doi.org/10.1140/epjb/e2004-00359-6.

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17

Sun, J. M., and Weili Luo. "Dynamics of low-dimensional dipolar systems." Physical Review E 56, no. 4 (October 1, 1997): 3986–92. http://dx.doi.org/10.1103/physreve.56.3986.

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18

Bembenek, Scott D., and Grzegorz Szamel. "Kinetic theory for dilute dipolar systems." Journal of Chemical Physics 117, no. 19 (November 15, 2002): 8886–91. http://dx.doi.org/10.1063/1.1496460.

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19

Füzi, János, and Lajos Károly Varga. "Dipolar interactions in nanosized granular systems." Physica B: Condensed Matter 343, no. 1-4 (January 2004): 320–24. http://dx.doi.org/10.1016/j.physb.2003.08.063.

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20

Kora, Youssef, and Massimo Boninsegni. "Patterned Supersolids in Dipolar Bose Systems." Journal of Low Temperature Physics 197, no. 5-6 (September 4, 2019): 337–47. http://dx.doi.org/10.1007/s10909-019-02229-z.

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21

Sutcliffe, Oliver B., Richard C. Storr, Thomas L. Gilchrist, and Paul Rafferty. "Azafulvenium methides: new extended dipolar systems." Journal of the Chemical Society, Perkin Transactions 1, no. 15 (2001): 1795–806. http://dx.doi.org/10.1039/b103250j.

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22

Wang, K. X., and Z. Ye. "Collective behaviour in electrical dipolar systems." Journal of Physics: Condensed Matter 13, no. 35 (August 16, 2001): 8031–38. http://dx.doi.org/10.1088/0953-8984/13/35/310.

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23

Fung, B. M., V. L. Ermakov, and A. K. Khitrin. "Coherent Response Signals of Dipolar-coupled Spin Systems." Zeitschrift für Naturforschung A 59, no. 4-5 (May 1, 2004): 209–16. http://dx.doi.org/10.1515/zna-2004-4-504.

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Recently, it has been demonstrated that long pulses of a weak radio-frequency field can generate long-lived coherent NMR signals in bulk liquid crystals, which are systems of dipolar-coupled spins with unresolved conventional spectra. Here we describe this phenomenon in more detail and present results of new experimental investigations and computer simulations. It is shown that such response signals can also be excited when the initial spin state of a system corresponds to dipolar ordering. In addition, results of the application of weak pulses on liquid crystalline systems with heteronuclear dipolar couplings are presented, and the role of overlapping peaks is explored.

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24

Doronin, S. I., E. B. Fel’dman, E. I. Kuznetsova, G. B. Furman, and S. D. Goren. "Dipolar temperature and multiple-quantum NMR dynamics in dipolar ordered-spin systems." JETP Letters 86, no. 1 (September 2007): 24–27. http://dx.doi.org/10.1134/s0021364007130061.

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25

Tang, Ke, Hong Jie Yang, Lin Hong Cao, Hong Tao Yu, Jing Song Liu, and Jun Xia Wang. "High Efficiency Algorithm for the Dipolar Interaction Energy of 2D Magnetic Nanoparticle Systems." Materials Science Forum 689 (June 2011): 108–13. http://dx.doi.org/10.4028/www.scientific.net/msf.689.108.

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Most of simulations often require the calculation of all pairwise interaction in large ensembles of particles, such as N-body problem of gravitation, electrostatic interaction and magnetic dipolar interaction, etc. The main difficulty in the calculation of long-range interaction is how to accelerate the slow convergence of the occurring sums. In this work, we are interested in the dipolar interaction in the two dimensional (2D) magnetic dipolar nanoparticle systems, which have attracted much attention due to both their important technological applications such as high-density patterned recording media and their rich and often unusual experimental behaviours. We develop a high efficiency algorithm based on the Lekner method to evaluate the magnetic dipolar energy for such systems, where the simulation cell is periodically replicated in the plane. Taking advantage of the symmetry of the systems, the dipolar interaction energy is expressed by rapidly converging series of modified Bessel functions in our algorithm. We found that our algorithm is better than the traditional Ewald summation method in efficiency for the regular arrays. Moreover, two simple formulas are obtained to evaluate the self-energy, which is important in the simulation of the dipolar systems.

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26

Macrì, Tommaso, and Fabio Cinti. "Many-Body Physics of Low-Density Dipolar Bosons in Box Potentials." Condensed Matter 4, no. 1 (January 22, 2019): 17. http://dx.doi.org/10.3390/condmat4010017.

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Crystallization is a generic phenomenon in classical and quantum mechanics arising in a variety of physical systems. In this work, we focus on a specific platform, ultracold dipolar bosons, which can be realized in experiments with dilute gases. We reviewed the relevant ingredients leading to crystallization, namely the interplay of contact and dipole–dipole interactions and system density, as well as the numerical algorithm employed. We characterized the many-body phases investigating correlations and superfluidity.

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27

Biehs, Svend-Age. "Thermal radiation in dipolar many-body systems." EPJ Web of Conferences 266 (2022): 07001. http://dx.doi.org/10.1051/epjconf/202226607001.

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The framework of fluctuational electrodynamics for dipolar many-body systems is one of the working horse for theoretical studies of thermal radiation at the nanoscale which includes dissipation and retardation in a naturally way. Based on this framework I will discuss near-field thermal radiation in non-reciprocal and topological many-body systems. The appearance of the Hall and non-reciprocal diode effect for thermal radiation illustrates nicely the interesting physics in such systems as well as the edge mode dominated heat transfer in topological Su-Schrieffer-Heeger chains and a honeycomb lattices of plasmonic nanoparticles. In the latter, the theory allows for quantifying the effciency of the edge-mode dominated heat transfer as function of the dissipation. Finally, I will present how the theoretical framework can be generalized to study far-field thermal emission of many-body systems close to an environment like a substrate, for instance. This theory might be particularly interesting for modelling thermal imaging microscopes.

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28

Schechter, M., P. C. E. Stamp, and N. Laflorencie. "Quantum spin glass in anisotropic dipolar systems." Journal of Physics: Condensed Matter 19, no. 14 (March 23, 2007): 145218. http://dx.doi.org/10.1088/0953-8984/19/14/145218.

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29

Høye, J. S., and G. Stell. "Ferroelectric phase transition in simple dipolar systems." Molecular Physics 86, no. 4 (November 1995): 707–13. http://dx.doi.org/10.1080/00268979500102301.

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30

Pshenichnikov, A. F., and V. V. Mekhonoshin. "Phase separation in dipolar systems: Numerical simulation." Journal of Experimental and Theoretical Physics Letters 72, no. 4 (August 2000): 182–85. http://dx.doi.org/10.1134/1.1320108.

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31

Jensen, S. J. Knak, and K. Kjaer. "Dipolar spin systems: models for LiHoF4and LiHo0.3Y0.7F4." Journal of Physics: Condensed Matter 1, no. 13 (April 3, 1989): 2361–68. http://dx.doi.org/10.1088/0953-8984/1/13/009.

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32

Klapp, S. H. L., and G. N. Patey. "Ferroelectric order in positionally frozen dipolar systems." Journal of Chemical Physics 115, no. 10 (September 8, 2001): 4718–31. http://dx.doi.org/10.1063/1.1388184.

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33

Evensky, David A., and Peter G. Wolynes. "Transport of dipolar excitons in disordered systems." Chemical Physics Letters 209, no. 1-2 (June 1993): 185–89. http://dx.doi.org/10.1016/0009-2614(93)87221-n.

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34

Załuska-Kotur, Magdalena A., and Marek Cieplak. "Glassy properties of dilute dipolar Ising systems." Journal of Magnetism and Magnetic Materials 136, no. 1-2 (September 1994): 127–37. http://dx.doi.org/10.1016/0304-8853(94)90456-1.

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35

Weis, J.-J. "Simulation of quasi-two-dimensional dipolar systems." Journal of Physics: Condensed Matter 15, no. 15 (April 9, 2003): S1471—S1495. http://dx.doi.org/10.1088/0953-8984/15/15/311.

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36

Ghazali, A., and J. C. S. Lévy. "Solid-liquid transition in 2D dipolar systems." Europhysics Letters (EPL) 74, no. 2 (April 2006): 355–61. http://dx.doi.org/10.1209/epl/i2005-10532-1.

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37

Ayton, G., M. J. P. Gingras, and G. N. Patey. "Orientational Ordering in Spatially Disordered Dipolar Systems." Physical Review Letters 75, no. 12 (September 18, 1995): 2360–63. http://dx.doi.org/10.1103/physrevlett.75.2360.

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38

BILSKI, P., N. A. SERGEEV, and J. WASICKI. "Echoes in spin systems with dipolar interactions." Molecular Physics 101, no. 3 (February 10, 2003): 335–38. http://dx.doi.org/10.1080/0026897021000018178.

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39

Joffrin, J. "Electric dipolar systems: Examples of glassy state." Phase Transitions 32, no. 1-4 (April 1991): 141–43. http://dx.doi.org/10.1080/01411599108219171.

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40

Goerz, Oliver, and Helmut Ritter. "N-Alkylated dinitrones from isosorbide as cross-linkers for unsaturated bio-based polyesters." Beilstein Journal of Organic Chemistry 10 (April 22, 2014): 902–9. http://dx.doi.org/10.3762/bjoc.10.88.

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Isosorbide was esterified with acryloyl chloride and crotonic acid yielding isosorbide diacrylate (9a) and isosorbide dicrotonate (9b), which were reacted with benzaldehyde oxime in the presence of zinc(II) iodide and boron triflouride etherate as catalysts to obtain N-alkylated dinitrones 10a/b. Poly(isosorbide itaconite -co- succinate) 13 as a bio-based unsaturated polyester was cross-linked by a 1,3-dipolar cycloaddition with the received dinitrones 10a/b. The 1,3-dipolar cycloaddition led to a strong change of the mechanical properties which were investigated by rheological measurements. Nitrones derived from methyl acrylate (3a) and methyl crotonate (3b) were used as model systems and reacted with dimethyl itaconate to further characterize the 1,3-dipolaric cycloaddition.

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41

Datta, Avijit, Christoph A. Marx, Christoph Uiberacker, and Werner Jakubetz. "Dipole mediated tunnelling: Robust single-pulse population transfer across dipolar double-well systems." Chemical Physics 338, no. 2-3 (September 2007): 237–51. http://dx.doi.org/10.1016/j.chemphys.2007.03.017.

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42

Ayton, G., M. J. P. Gingras, and G. N. Patey. "Ferroelectric and dipolar glass phases of noncrystalline systems." Physical Review E 56, no. 1 (July 1, 1997): 562–70. http://dx.doi.org/10.1103/physreve.56.562.

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43

Gabay, M., T. Garel, and R. Botet. "Two-dimensional chiral dipolar systems: a theoretical investigation." Journal of Physics C: Solid State Physics 20, no. 35 (December 20, 1987): 5963–74. http://dx.doi.org/10.1088/0022-3719/20/35/012.

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44

Cichocki, B., B. U. Felderhof, and K. Hinsen. "Electrostatic interactions in periodic Coulomb and dipolar systems." Physical Review A 39, no. 10 (May 1, 1989): 5350–58. http://dx.doi.org/10.1103/physreva.39.5350.

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45

Ravichandran, Sarangan, and Biman Bagchi. "Rank Dependence of Orientational Relaxation in Dipolar Systems." Journal of Physical Chemistry 98, no. 11 (March 1994): 2729–31. http://dx.doi.org/10.1021/j100062a004.

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46

Załuska-Kotur, Magdalena A., and J. S. Høye. "Dipolar systems — transition to glassy ordering on dilution." Journal of Magnetism and Magnetic Materials 161 (August 1996): 111–17. http://dx.doi.org/10.1016/s0304-8853(96)00066-2.

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47

Kędziora, P., J. Jadżyn, K. De Smet, and L. Hellemans. "Nonlinear dielectric relaxation in non-interacting dipolar systems." Chemical Physics Letters 289, no. 5-6 (June 1998): 541–45. http://dx.doi.org/10.1016/s0009-2614(98)00457-6.

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48

Carmesin, H. O. "Mapping of quadropolar to dipolar many-particle systems." Physics Letters A 125, no. 6-7 (November 1987): 294–98. http://dx.doi.org/10.1016/0375-9601(87)90145-9.

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49

Arjona, Odon, Roberto Fernandez De La Pkadilla, Rosa A. Perez, and Joaquin Plumet. "New functionalizations of oxanorbornenic systems via 1,3-dipolar." Tetrahedron 44, no. 23 (January 1988): 7199–204. http://dx.doi.org/10.1016/s0040-4020(01)86090-7.

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50

Kleemann, W., and A. Klossner. "Glassy and domain states in random dipolar systems." Ferroelectrics 150, no. 1 (December 1993): 35–45. http://dx.doi.org/10.1080/00150199308008692.

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