Dissertations / Theses on the topic 'Spin polarised'
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Sadeghzadeh, Kayvan. "Spin polarised Fermi gases." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610744.
Full textAllen, William D. "Aspects of spin polarised transport." Thesis, University of Oxford, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368082.
Full textRoskoss, Alexander. "Spin polarised metastable deexcitation spectroscopy." Thesis, University of York, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.434022.
Full textBlackwood, Elaine. "Spin polarised dynamics in quantum wells." Thesis, University of Southampton, 1993. https://eprints.soton.ac.uk/206553/.
Full textNyman, Robert Andrew. "Spin dynamics of polarised fermi-liquid 3He." Thesis, University of Nottingham, 2003. http://eprints.nottingham.ac.uk/10042/.
Full textMatthews, M. T. "A study of nucleon spin structure through polarised muon polarised proton deep inelastic scattering." Thesis, University of Liverpool, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.233868.
Full textHope, S. "Spin polarised radiation studies of ultrathin magnetic films." Thesis, University of Cambridge, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.604219.
Full textWightman, David Richard. "NMR properties of spin-polarised '3He-'4He solutions." Thesis, University of Nottingham, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.293656.
Full textHampson, T. M. M. "Transport properties of dilute, spin-polarised fermi liquids." Thesis, University of Nottingham, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384305.
Full textSinha, Priyasmita. "Highly spin-polarised chiral transition metal silicide epilayers." Thesis, University of Leeds, 2015. http://etheses.whiterose.ac.uk/13071/.
Full textBergmann, Kirsten von. "Iron nanostructures studied by spin-polarised scanning tunneling microscopy." [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=971962464.
Full textJo, Moon-Ho. "Spin polarised tunnel junctions based on half-metallic manganites." Thesis, University of Cambridge, 2001. https://www.repository.cam.ac.uk/handle/1810/183622.
Full textSmith, Timothy John. "The application of spin polarised neutron scattering to superconductors." Thesis, Loughborough University, 1999. https://dspace.lboro.ac.uk/2134/10465.
Full textSchofield, Debra Mary. "Development of spin-polarised scanning tunnelling microscopy for the study of spin electronic materials." Thesis, University of York, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.442379.
Full textBebb, Andrew M. "Synchrotron radiation studies of spin-polarised electron momentum density distributions." Thesis, University of Warwick, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.404845.
Full textMarshall, Ishbel. "Studies of novel organic and inorganic compounds using spin polarised muons." Thesis, University of Oxford, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.437353.
Full textSchedin, Bernt Fredrik. "Angle-resolved spin-polarised inverse photoemission spectroscopy studies of Ni(110)." Thesis, University of Liverpool, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317198.
Full textPhillips, Lee Charles. "Spintronic devices with highly spin-polarised manganite electrodes and graphene channels." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610490.
Full textPravica, Luka. "Polarised electron studies of spin-dependent interactions in zinc and krypton atoms." University of Western Australia. School of Physics, 2006. http://theses.library.uwa.edu.au/adt-WU2006.0063.
Full textGehrmann, Thomas. "Proton structure from deep inelastic and diffractive scattering." Thesis, Durham University, 1996. http://etheses.dur.ac.uk/5224/.
Full textKaiser, Ralf Bernd. "Measurement of the spin structure of the neutron using polarised deep inelastic scattering." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq24319.pdf.
Full textAllsworth, Max Daniel. "The effect of spin-polarised electrons on superconductivity in a ferromagnet superconductor bilayer." Thesis, University of Birmingham, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.273991.
Full textKato, Takashi, Yasuhito Ishikawa, Hiroyoshi Itoh, and Jun-ichiro Inoue. "Intrinsic anisotropic magnetoresistance in spin-polarized two-dimensional electron gas with Rashba spin-orbit interaction." American Physical Society, 2008. http://hdl.handle.net/2237/11252.
Full textMartyniak-Stronczek, Aleksandra. "Using spin polarised positive muons for studying guest molecule partitioning in soft matter structures." [S.l. : s.n.], 2007. http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-29731.
Full textLinder, Jacob, Takehito Yokoyama, Yukio Tanaka, and Asle Sudbø. "Strongly spin-polarized current generated in a Zeeman-split unconventional superconductor." American Physical Society, 2008. http://hdl.handle.net/2237/11294.
Full textEvaldsson, Martin. "Spin splitting in open quantum dots and related systems." Licentiate thesis, Linköping : Linköpings universitet, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-4939.
Full textNguyen, Ngoc-Minh. "Propagation de parois magnétiques dans des films et des pistes à anisotropie magnétique perpendiculaire." Thesis, Paris 11, 2012. http://www.theses.fr/2012PA112356.
Full textThis work is focused on the study of magnetic domain wall propagation mechanisms in the thin films and wires based on materials with perpendicular magnetic anisotropy which are promissing for the non-volatile magnetic memory of ultra high density. I’m interested in the influence of structural defects on the mechanisms of domain wall propagation by using the Kerr microscopy technique and the transport measurements. Three important results were obtained: (1) In the spin valve structure of CoNi/Cu/CoNi, a strong influence of the dipolar magnetic field induced by the hard layer can generate a parasitic nucleation in the soft layer and create an asymmetric domain wall propagation driven by a spin polarized current. I also demonstrated that in sub-50nm wires, the nature of magnetization reversal process is the multiple nucleation events because of strong pinning centers that hinder the domain wall motion; (2) By observing the magnetic domain geometry et studying the creep law, I have pointed out that in the CoNi-CoFeB multilayers and the crystallized Ta-CoFeB-MgO multilayers, the structural defect density is low and the propagation fields can be reduced; (3) I found a spin-transfer effect with low current density (≈5x1011 A/cm2) in CoNi-CoFeB wires. I also demonstrated that the Oersted field can strongly influence the domain wall motion, especially in the material with low propagation field. Finally, in the Ta-CoFeB-MgO wires, I could measure a wide range of domain wall velocity and I show that the domain wall can move at a very low propagation field (0.1mT)
Jenkins, Anne Ceri. "Applications of spin-polarised relativistic scattering theory to the calculation of the electronic properties of heavy metals and alloys." Thesis, Keele University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.321408.
Full textAndrieux, Vincent. "Polarisation of quarks and gluons inside the nucleon." Thesis, Paris 11, 2014. http://www.theses.fr/2014PA112244/document.
Full textThe work presented in this thesis is related to the study of the longitudinal spin structure of the nucleon. The aim is to determine the contribution to the spin 1/2 of the proton in terms of its constituents, quarks and gluons. The analysis is performed on the data taken with the COMPASS experiment, which benefits from a polarised muon beam at 200 GeV scattered off polarised protons from an ammonia target of 1.2 m long. The double longitudinal spin asymmetry of deep inelastic scattering cross-Section. The spin-Dependent structure function of the proton g₁p is derived from these measurements, which extend the kinematic world coverage to unexplored region so far (0,0036 < x< 0,57; 1,03 < Q² (GeV/c)² < 96 and 23 < W² (GeV/c)² < 320).The results obtained with a high statistical precision are included in a Next-To-Leading order QCD analysis of world g₁p, g₁d and g₁n (proton, deuteron and neutron) data to parametrise the polarised quark and gluon distributions. The g₁ world coverage of the x and Q² kinematic domain, which is a key point in the sensitivity to the gluon polarisation ΔG, turns out to be too limited for an accurate ΔG determination. Nevertheless, the QCD analysis allows to determine the quark spin contributions to the proton spin to 0.26<ΔΣ<0.33 at Q² = 3 (GeV/c)² in the MSbar scheme. The dominant uncertainty on ΔΣ is related to the choice of functional forms assumed in the fit. Finally, the Bjorken sum rule, which constitutes a fundamental test of QCD, is verified on the COMPASS data alone with a precision of 9%
Bowles, Cameron Michael Albert, and cameronbowles@hotmail com. "Pushing the boundaries of condensed matter electron momentum spectroscopy." The Australian National University. Research School of Physical Sciences and Engineering, 2008. http://thesis.anu.edu.au./public/adt-ANU20080409.193948.
Full textRay, Soumya Jyoti. "Nanoscale investigation of superconductivity and magnetism using neutrons and muons." Thesis, University of St Andrews, 2012. http://hdl.handle.net/10023/3190.
Full textBelkhir, Mohamed Akli. "Structure de bandes à spin polarisé par la méthode des fonctions localisées : application à MnO et NiO." Metz, 1988. http://docnum.univ-lorraine.fr/public/UPV-M/Theses/1988/Belkhir.Mohamed_Akli.SMZ8812.pdf.
Full textA spin polarized band calculation based on a localized function method has been performed on MnO and NiO in their antiferromagnetic configuration. When the intra-atomic exchange is strong enough like in MnO, a gap appears between the majority and minority d bands which suffices to explain the insulating behaviour of that oxide. Further it has been show that a gap is systematically opened in each majority and minority band due in NiO is responsible for its semiconducting properties. Thus the p-d hybridization which prevents the gap formation in the NaCl structure leads to a satisfactory issue only when the magnetic ordering is taken into account
Ding, Haifeng. "Spin-polarized scanning tunneling microscopy." [S.l. : s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=963217186.
Full textHasch, Delia. "Messung der polarisierten Strukturfunktion g1(x, Q 2) des Protons mit dem HERMES-Experiment." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 1999. http://dx.doi.org/10.18452/14523.
Full textThe subject of this thesis is the measurement of the polarised structure function g1p of the proton in deeply inelastic positron-proton-scattering at a centre of mass energy of 7.5 GeV. The data used in the analysis were recorded during the 1997 running period of the Hermes experiment using a longitudinally nuclear polarised hydrogen target in the 27.6 GeV Hera polarised positron storage ring. The cross section asymmetry of positron-proton-scattering has been measured by counting the number of inclusively reconstructed and selected positrons with target spin vector parallel or antiparallel to the beam spin direction. Background processes, spectrometer effects, and radiative corrections have been taken into account by applying different correction procedures. Here background corrections were determined from data while spectrometer corrections were computed from Monte Carlo simulation. The dependence of Monte Carlo and radiative corrections on the model asymmetry chosen to describe polarisation dependent effects has been minimised by applying an iterative procedure. From the fully corrected cross section asymmetry the asymmetry g1/F1 has been computed in the kinematic region 0.021 < x < 0.85 and Q2 > 0.8 GeV^2 with a systematic uncertainty of 8% and a statistical accuracy of 6% to 20%, raising for decreasing x values. The polarised structure function g1p(x,Q2), determined from the asymmetry g1/F1 , was evoluted to a common Q2_0 value assuming g1/F1 to be independent of Q2. Its first moment evaluated in the measured x region is int_{0.021}^{0.85} dx g1p(x,Q2_0) = 0.122 =- 0.003 (stat) =- 0.010 (sys) at Q2_0 = 2.5 GeV^2. This result has been compared with those from E143 at SLAC and from SMC at CERN, both calculated with the same integration scheme and for the kinematic range of Hermes. With respect to the statistical uncertainties the agreement is better than 0.6 and 1.2 standard deviations, respectively. Extrapolation over the entire x range [0,1] yield for the first moment\int_{0}^{1} dx g1p(x,Q2_0) = 0.132 +- 0.003 (stat) +- 0.010 (sys) +- 0.006 (extr) where the additional error gives the uncertainty in the extrapolation x -> 0. The interpretation of this measurement in the framework of the quark parton model taking QCD corrections of the order O(alphaS^3) into account results in a contribution of the quarks to the total nucleon spin of (30 +- 10)% at Q2_0 = 2.5 GeV^2. This result corresponds to a deviation from the Ellis-Jaffe prediction by 2.5 standard deviation regarding the given total uncertainty. Within the quark parton model the deviation can be interpreted as negative polarisation of the strange sea quarks with a contribution of (-9 +- 4)% at Q2_0 = 2.5 GeV^2. Different groups give contributions of the quarks to the nucleon spin of 19% to 44% which were obtained from QCD analyses of various data sets. The fundamental Bjorken sum rule has been determined at Q2_0 = 2.5 GeV^2 using the Hermes measurement of the polarised neutron structure function g1n. With respect to the experimental accuracy of 13 %, the result agrees within 0.5 standard deviation with the theoretical prediction taking QCD corrections of the order O(alphaS^3) into account.
Tehrani-Nasab, Sa'id. "On spin diffusion in polarized paramagnets." Thesis, Royal Holloway, University of London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.391900.
Full textPramanik, Sandipan. "Spin Polarized Transport in Nanoscale Devices." VCU Scholars Compass, 2006. http://scholarscompass.vcu.edu/etd/1092.
Full textДенисов, Станіслав Іванович, Станислав Иванович Денисов, Stanislav Ivanovych Denysov, and V. V. Shchotkin. "Influence of Spin-polarized Current on Spin Waves in Ferromagnets." Thesis, Sumy State University, 2018. http://essuir.sumdu.edu.ua/handle/123456789/67944.
Full textBhandari, Nikhil K. "Tunable All Electric Spin Polarizer." University of Cincinnati / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1393237571.
Full textChen, Peifeng. "Spin polarized tunneling and spin injection in Fe-GaAs hybrid structures." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=981364837.
Full textGröbli, Jean-Claude. "Spin filter and highly polarized electron sources /." [S.l.] : [s.n.], 1995. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=11148.
Full textNewman, Chris. "Spin polarized transport in hybrid ferromagnetic nanostructures." Thesis, Lancaster University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.414891.
Full textHatton, D. C. "Spin polarized electron scattering at ferromagnetic interfaces." Thesis, University of Cambridge, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.603854.
Full textÖzdemir, Mehtap Özyüzer Lütfi. "Spin polarized tunneling spectroscopy of intercalated Bi2Sr2CaCu2O8+." [s.l.]: [s.n.], 2006. http://library.iyte.edu.tr/tezlerengelli/master/malzemebilimivemuh/T000557.pdf.
Full textFördös, Tibor. "Coherent light sources with spin-polarized current." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLX043/document.
Full textSpin-lasers are semiconductor devices in which the radiative recombination processes involving spin-polarized carriers result in an emission of circularly polarized photons. Nevertheless, additional linear in-plane anisotropies in the cavity generally lead in preferential linearly-polarized laser emission and to possible coupling between modes. In this thesis, a general method for the modeling of semiconductor laser such as vertical-(external)-cavity surface-emitting laser containing multiple quantum wells and involving anisotropies that may reveal i) a local linear birefringence due to the strain field at the surface or ii) a birefringence in quantum wells (QWs) due to phase amplitude coupling originating from the reduction of the biaxial D2d to the C2v symmetry group at the III-V ternary semiconductor interfaces. A novel scattering S-matrix recursive method is implemented using a gain tensor derived analytically from the Maxwell-Bloch equations. It enables to model the properties of the emission (threshold, polarization, mode splitting) from the laser with multiple quantum well active zones by searching for the resonant eigenmodes of the cavity. The method is demonstrated on real laser structures and is used for the extraction of optical permittivity tensors of surface strain and quantum wells in agreement with experiments. The method is generalized to find the laser eigenmodes in the most general case of circular polarized pumps (unbalance between the spin-up and spin-down channels) and linear gain dichroism. In addition, the measurement of full 4x4 Mueller matrix for multiple angles of incidence and in-plane azimuthal angles has been used for extraction of optical permittivity tensors of surface strained layers and quantum wells. Such spectral dependence of optical tensor elements are crucial for modeling of spin-laser eigenmodes, resonance conditions, and also for understanding of sources of structure anisotropies
Luther, Bryan A. "Spin observables in the quasifree (polarized proton, polarized neutron) reaction at 495 MeV /." The Ohio State University, 1993. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487848078451672.
Full textDörr, Kathrin. "Ferromagnetic manganites: spin-polarized conduction and competing interactions." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2007. http://nbn-resolving.de/urn:nbn:de:swb:14-1193676987929-14995.
Full textTaddei, Fabio. "Spin-polarized transport in superconducting and ferromagnetic nanostructures." Thesis, Lancaster University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369499.
Full textHayward, D. J. "Experiments on magnetically spin-polarized '3He-'4He solutions." Thesis, Lancaster University, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379199.
Full textDörr, Kathrin. "Ferromagnetic manganites: spin-polarized conduction and competing interactions." Doctoral thesis, Technische Universität Dresden, 2006. https://tud.qucosa.de/id/qucosa%3A23959.
Full textYokoyama, Koji. "Muon probes of spin-polarized electrons in GaAs." Diss., UC access only, 2009. http://proquest.umi.com/pqdweb?index=104&did=1907186881&SrchMode=1&sid=1&Fmt=7&retrieveGroup=0&VType=PQD&VInst=PROD&RQT=309&VName=PQD&TS=1270484411&clientId=48051.
Full textIncludes abstract. Includes bibliographical references (leaves 121-123). Issued in print and online. Available via ProQuest Digital Dissertations.