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Relevant bibliographies by topics / Spin wave instability

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Academic literature on the topic 'Spin wave instability'

Author: Grafiati

Published: 18 May 2024

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Journal articles on the topic "Spin wave instability"

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Nazarov, A. V., R. G. Cox, and C. E. Patton. "General spin wave instability theory." IEEE Transactions on Magnetics 37, no. 4 (July 2001): 2380–82. http://dx.doi.org/10.1109/20.951178.

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Okabe, Takuya. "Spin-wave instability in itinerant ferromagnets." Physical Review B 57, no. 1 (January 1, 1998): 403–11. http://dx.doi.org/10.1103/physrevb.57.403.

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Scalapino, D. J., E. Loh, and J. E. Hirsch. "d-wave pairing near a spin-density-wave instability." Physical Review B 34, no. 11 (December 1, 1986): 8190–92. http://dx.doi.org/10.1103/physrevb.34.8190.

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Haghshenasfard, Z., H. T. Nguyen, and M. G. Cottam. "Spin-wave Instability Theory for Ferromagnetic Nanostructures." Acta Physica Polonica A 127, no. 2 (February 2015): 192–97. http://dx.doi.org/10.12693/aphyspola.127.192.

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ANDERSSON, NILS, and KOSTAS D. KOKKOTAS. "THE R-MODE INSTABILITY IN ROTATING NEUTRON STARS." International Journal of Modern Physics D 10, no. 04 (August 2001): 381–441. http://dx.doi.org/10.1142/s0218271801001062.

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In this review we summarize the current understanding of the gravitational-wave driven instability associated with the so-called r-modes in rotating neutron stars. We discuss the nature of the r-modes, the detailed mechanics of the instability and its potential astrophysical significance. In particular we discuss results regarding the spin-evolution of nascent neutron stars, the detectability of r-mode gravitational waves and mechanisms limiting the spin-rate of accreting neutron stars in binary systems.

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MALOZOVSKY, Y. M., and J. D. FAN. "SUPERCONDUCTIVITY FROM SPIN-WAVE EXCITATIONS NEAR THE FERROMAGNETIC AND ANTIFERROMAGNETIC INSTABILITIES." International Journal of Modern Physics B 19, no. 01n03 (January 30, 2005): 77–85. http://dx.doi.org/10.1142/s0217979205027974.

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We study pairing by the exchange of spin-wave excitations near the ferromagnetic or antiferromagnetic instability in terms of the effective two-particles T-matrix. We show that near the ferromagnetic instability the paring due to the exchange of the paramagnetic excitations can occur in the p-wave state (ℓ=1) and m=±1. We show that near the antiferromagnetic instability the pairing due to the exchange by the paramagnetic excitations occurs also in the p-wave state (ℓ=1) but with m=0 and that there is no pairing in d-wave state.

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EPSHTEIN, ERNEST, YURI GULYAEV, and PETER ZILBERMAN. "JOINT ACTION OF SPIN-TRANSFER AND SPIN-INJECTION TORQUES IN FERROMAGNETIC JUNCTIONS." International Journal of Nanoscience 06, no. 05 (October 2007): 363–66. http://dx.doi.org/10.1142/s0219581x0700495x.

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We consider theoretically a current flowing perpendicular to interfaces of a spin-valve type ferromagnetic metallic junction. For the first time a simultaneous action of the two current effects is investigated, namely, the nonequilibrium longitudinal spin injection and the transverse spin surface torque. Dispersion relations for fluctuations are derived and solved under the proper boundary conditions. Joint action of the two effects mentioned lowers the instability threshold, its typical value being 1 × 106–3 × 107 A/cm2. Spin wave excitations may soften near the threshold. A nonlinear problem is solved about steady state arising due to instability development.

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KASIMOV, ASLAN R., and D. SCOTT STEWART. "Spinning instability of gaseous detonations." Journal of Fluid Mechanics 466 (September 10, 2002): 179–203. http://dx.doi.org/10.1017/s0022112002001192.

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We investigate hydrodynamic instability of a steady planar detonation wave propagating in a circular tube to three-dimensional linear perturbations, using the normal mode approach. Spinning instability is identified and its relevance to the well-known spin detonation is discussed. The neutral stability curves in the plane of heat release and activation energy exhibit bifurcations from low-frequency to high-frequency spinning modes as the heat release is increased at fixed activation energy. With a simple Arrhenius model for the heat release rate, a remarkable qualitative agreement with experiment is obtained with respect to the effects of dilution, initial pressure and tube diameter on the behaviour of spin detonation. The analysis contributes to the explanation of spin detonation which has essentially been absent since the discovery of the phenomenon over seventy years ago.

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Brey, L., and B. I. Halperin. "Spin-density-wave instability in wide parabolic quantum wells." Physical Review B 40, no. 17 (December 15, 1989): 11634–38. http://dx.doi.org/10.1103/physrevb.40.11634.

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Machida, Kazushige, and Masaru Kato. "Inherent Spin-Density-Wave Instability in Heavy-Fermion Superconductivity." Physical Review Letters 58, no. 19 (May 11, 1987): 1986–88. http://dx.doi.org/10.1103/physrevlett.58.1986.

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Dissertations / Theses on the topic "Spin wave instability"

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Kar, Rakesh. "Theoritical investigation on spin wave instability and magnon mediated superconductivity." Thesis, University of North Bengal, 2017. http://hdl.handle.net/123456789/2600.

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Yevstafyev, Oleksandr. "Instabilité explosive des ondes magneto-élastiques." Phd thesis, Ecole Centrale de Lille, 2011. http://tel.archives-ouvertes.fr/tel-00607191.

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Les instabilités paramétriques non linéaires (NL) ont été observées sur les ondes magnéto-élastiques dans le cas d'un couplage de trois quasi-phonons sous pompage électromagnétique. La théorie en prédit une dynamique supercritique explosive, mais limitée expérimentalement par le décalage de fréquence dû aux fortes nonlinéarités. La dynamique supercritique des instabilités paramétriques NL est étudiée dans deux matériaux antiferromagnétiques "plan facile" (AFEP): l'hématite α-Fe2O3 et le borate de fer FeBO3. Ces matériaux possèdent une très grande NL acoustique effective en raison du couplage magnéto-élastique élevé. Les mécanismes de limitation de la dynamique explosive ont été analysés à l'aide de l'approximation anharmonique. La compensation du décalage fréquentiel NL par une modulation de phase singulière du pompage a été proposée et théoriquement vérifiée, puis utilisée pour l'observation expérimentale de la dynamique supercritique explosive des excitations de trois quasi-phonons dans les résonateurs magnéto-élastiques. Les études sur FeBO3 ont été réalisées dans la gamme de température 77 K - 293 K où les paramètres magnéto-élastiques du cristal varient de façon significative. Un modèle fortement non linéaire des excitations de trois quasi-phonons dans les AFEPs a été développé. Les simulations numériques sont en accord avec les résultats expérimentaux. Les études théoriques de couplage de trois ondes magnéto-élastiques progressives ont été effectuées sur la base de modèles théoriques prenant en compte la non-linéarité cubique des cristaux AFEP réels. Les simulations numériques prévoient un comportement explosif et une localisation spatiale des triades générées

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Lim, Say-Peng. "Non-linear instabilites of spin waves in parallel-pumped easy plane ferromagnets." 1988. http://catalog.hathitrust.org/api/volumes/oclc/20234599.html.

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Thesis (Ph. D.)--University of Wisconsin--Madison, 1988.
Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 70-72).

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Books on the topic "Spin wave instability"

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Tibaldi, Stefano, and Franco Molteni. Atmospheric Blocking in Observation and Models. Oxford University Press, 2018. http://dx.doi.org/10.1093/acrefore/9780190228620.013.611.

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The atmospheric circulation in the mid-latitudes of both hemispheres is usually dominated by westerly winds and by planetary-scale and shorter-scale synoptic waves, moving mostly from west to east. A remarkable and frequent exception to this “usual” behavior is atmospheric blocking. Blocking occurs when the usual zonal flow is hindered by the establishment of a large-amplitude, quasi-stationary, high-pressure meridional circulation structure which “blocks” the flow of the westerlies and the progression of the atmospheric waves and disturbances embedded in them. Such blocking structures can have lifetimes varying from a few days to several weeks in the most extreme cases. Their presence can strongly affect the weather of large portions of the mid-latitudes, leading to the establishment of anomalous meteorological conditions. These can take the form of strong precipitation episodes or persistent anticyclonic regimes, leading in turn to floods, extreme cold spells, heat waves, or short-lived droughts. Even air quality can be strongly influenced by the establishment of atmospheric blocking, with episodes of high concentrations of low-level ozone in summer and of particulate matter and other air pollutants in winter, particularly in highly populated urban areas.Atmospheric blocking has the tendency to occur more often in winter and in certain longitudinal quadrants, notably the Euro-Atlantic and the Pacific sectors of the Northern Hemisphere. In the Southern Hemisphere, blocking episodes are generally less frequent, and the longitudinal localization is less pronounced than in the Northern Hemisphere.Blocking has aroused the interest of atmospheric scientists since the middle of the last century, with the pioneering observational works of Berggren, Bolin, Rossby, and Rex, and has become the subject of innumerable observational and theoretical studies. The purpose of such studies was originally to find a commonly accepted structural and phenomenological definition of atmospheric blocking. The investigations went on to study blocking climatology in terms of the geographical distribution of its frequency of occurrence and the associated seasonal and inter-annual variability. Well into the second half of the 20th century, a large number of theoretical dynamic works on blocking formation and maintenance started appearing in the literature. Such theoretical studies explored a wide range of possible dynamic mechanisms, including large-amplitude planetary-scale wave dynamics, including Rossby wave breaking, multiple equilibria circulation regimes, large-scale forcing of anticyclones by synoptic-scale eddies, finite-amplitude non-linear instability theory, and influence of sea surface temperature anomalies, to name but a few. However, to date no unique theoretical model of atmospheric blocking has been formulated that can account for all of its observational characteristics.When numerical, global short- and medium-range weather predictions started being produced operationally, and with the establishment, in the late 1970s and early 1980s, of the European Centre for Medium-Range Weather Forecasts, it quickly became of relevance to assess the capability of numerical models to predict blocking with the correct space-time characteristics (e.g., location, time of onset, life span, and decay). Early studies showed that models had difficulties in correctly representing blocking as well as in connection with their large systematic (mean) errors.Despite enormous improvements in the ability of numerical models to represent atmospheric dynamics, blocking remains a challenge for global weather prediction and climate simulation models. Such modeling deficiencies have negative consequences not only for our ability to represent the observed climate but also for the possibility of producing high-quality seasonal-to-decadal predictions. For such predictions, representing the correct space-time statistics of blocking occurrence is, especially for certain geographical areas, extremely important.

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Book chapters on the topic "Spin wave instability"

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Bugaev, A. S., V. B. Gorsky, and A. V. Pomyalov. "Magnetoelastic Mode Effect on Spin-Wave Instability Threshold." In Physical Acoustics, 249–52. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4615-9573-1_27.

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Cherepanov, V. B. "On Threshold of Parametric Instability of Spin Waves in a Film with Rough Surface." In 25th Congress Ampere on Magnetic Resonance and Related Phenomena, 150. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-76072-3_78.

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Gulyaev, Yu V., A. V. Lugovskoi, and P. E. Zilberman. "Parametric Instability of Spin Waves in Ferromagnets Under a Spatially Localized Longitudinal Magnetic Pump Field." In Nonlinear Microwave Signal Processing: Towards a New Range of Devices, 213–51. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-011-5708-7_9.

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Chen, Ming, and Carl E. Patton. "SPIN WAVE INSTABILITY PROCESSES IN FERRITES." In Nonlinear Phenomena and Chaos in Magnetic Materials, 33–82. WORLD SCIENTIFIC, 1994. http://dx.doi.org/10.1142/9789814355810_0003.

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Chen, G. F., Z. Li, D. Wu, G. Li, W. Z. Hu, J. Dong, P. Zheng, J. L. Luo, and N. L. Wang. "Superconductivity at 41 K and its Competition with Spin-Density-Wave Instability in Layered CeO1 – xFxFeAs." In Peking University-World Scientific Advanced Physics Series, 129–38. WORLD SCIENTIFIC, 2018. http://dx.doi.org/10.1142/9789813273146_0010.

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Conference papers on the topic "Spin wave instability"

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Nakatani, Y., A. Thiaville, and J. Miltat. "Spin wave instability by spin-polarized current injection." In INTERMAG Asia 2005: Digest of the IEEE International Magnetics Conference. IEEE, 2005. http://dx.doi.org/10.1109/intmag.2005.1464026.

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Chen, M., C. E. Patton, G. Srinivasan, and Y. T. Zhang. "Ferromagnetic resonance foldover and spin wave instability in single crystal YIG films." In International Magnetics Conference. IEEE, 1989. http://dx.doi.org/10.1109/intmag.1989.690026.

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Kalinikos, B. A., and M. P. Kostylev. "Theory of parallel pump spin wave instability threshold for thin anisotropic ferromagnetic films." In 1993 Digests of International Magnetics Conference. IEEE, 1993. http://dx.doi.org/10.1109/intmag.1993.642125.

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Olson, H. M., P. Krivosik, K. Srinivasan, and C. E. Patton. "High Power Ferromagnetic Resonance, Resonance Saturation, and Spin Wave Instability in Thin Permalloy Films." In INTERMAG 2006 - IEEE International Magnetics Conference. IEEE, 2006. http://dx.doi.org/10.1109/intmag.2006.375577.

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Kim, Jeong-Won, Tony John, Subodh Adhikari, David Wu, Benjamin Emerson, Vishal Acharya, Timothy Lieuwen, Mitsunori Isono, and Toshihiko Saito. "Experimental Investigation of Interactions Between Two Closely Spaced Azimuthal Modes in a Multi-Nozzle Can Combustor." In ASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/gt2022-80725.

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Abstract Thermoacoustic instabilities in annular or circular combustors are often coupled with azimuthal modes. These modes can be characterized by a spin ratio, which quantifies the dominant mode between two counter-rotating waves, and a phase difference between them, which is directly related to the orientation of the anti-nodal line. This study investigates the instability amplitudes, spin ratio, and phase difference of two closely spaced (3% frequency difference), yet distinct azimuthal modes; one is the first azimuthal (1A) mode, and the other is a combination of first azimuthal and first longitudinal (1A1L) mode. Each mode itself consists of two peaks that are spaced even more closely in frequency (0.8% difference). Furthermore, distinct harmonics at 2X and 3X of these frequencies, presumably associated with nonlinearities, are also evident in the spectra. Each mode is band-pass filtered in spectrum to analyze them separately. For the 1A mode, the spin ratio and phase difference exhibit a variety of behaviors — including quasi-periodic standing waves, spinning waves, and intermittency — depending on operating conditions such as thermal power and azimuthal fuel staging. Similar trends are observed for the 1A1L mode. Moreover, there is clear coupling between the 1A and 1A1L modes, as their spin ratios are almost synchronized during the quasi-periodic standing wave. This synchronization is observed in phase differences as well, but not in the instability amplitude. For spinning dominant wave conditions, the spin ratio and phase difference of the two modes fluctuate in a seemingly random fashion, but the instability amplitudes are correlated, with modulation of the 1A mode leading that of the 1A1L mode. These results clearly indicate that complex coupling occurs across closely spaced and harmonically space frequencies under instability conditions, coupling that must be understood in order to capture limit cycle dynamics.

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Kockaert, Pascal, and Marc Haelterman. "Observation of isotropic polarization modulational instability in spun fiber." In Nonlinear Guided Waves and Their Applications. Washington, D.C.: OSA, 1999. http://dx.doi.org/10.1364/nlgw.1999.wb5.

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Chetkin, Sergey A. "Surface wave and its modulation instability in SBN-61." In SPIE Photonics Europe, edited by Benjamin J. Eggleton, Alexander L. Gaeta, and Neil G. Broderick. SPIE, 2012. http://dx.doi.org/10.1117/12.921599.

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Lapin, V. A., and A. A. Fotiadi. "Modulation instability of wave packets propagating in inhomogeneous nonlinear fiber." In SPIE Optics + Optoelectronics, edited by Mario Bertolotti, Joseph W. Haus, and Alexei M. Zheltikov. SPIE, 2017. http://dx.doi.org/10.1117/12.2265648.

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Dudley, John M., Goëry Genty, Frederic Dias, Bertrand Kibler, and Nail Akhmediev. "Modulation instability, Akhmediev breathers, and rogue waves in nonlinear fiber optics." In SPIE LASE, edited by Kanishka Tankala. SPIE, 2010. http://dx.doi.org/10.1117/12.841317.

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Imada, Go, Taiyo Nakagawa, Masataro Suzuki, Wataru Masuda, and Kiyoshi Yatsui. "Observation of excitation discharge instability induced by shock wave in transversely excited atmospheric gas laser." In SPIE Proceedings, edited by Krzysztof M. Abramski, Edward F. Plinski, and Wieslaw Wolinski. SPIE, 2003. http://dx.doi.org/10.1117/12.515480.

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