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Titlebook: Quantum Tunneling of Magnetization — QTM ’94; Leon Gunther,Bernard Barbara Book 1995 Springer Science+Business Media Dordrecht 1995 Experi

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书目名称Quantum Tunneling of Magnetization — QTM ’94
编辑Leon Gunther,Bernard Barbara
视频video
丛书名称NATO Science Series E:
图书封面Titlebook: Quantum Tunneling of Magnetization — QTM ’94;  Leon Gunther,Bernard Barbara Book 1995 Springer Science+Business Media Dordrecht 1995 Experi
描述The first NATO Advanced Workshop on Quantum Tunneling of Magnetization (QTM) was organized and co-directed by Bernard Barbara, Leon Gunther, Nicolas Garcia, and Anthony Leggett and was held from June, 27 through July 1, 1994 in Grenoble and Chichilianne, France. These Proceedings include twenty-nine articles that represent the contributions of the participants in the Workshop. Quantum Tunneling of Magnetization is not only interesting for purely academic reasons. It was pointed out in the review article by L. Gunther in the December, 1990 issue of Physics World, that QTM may be destined to play a significant role within the next two decades in limiting the density of information storage in magnetic systems. Recent advances have indicated that this limitation may well be reached even earlier than first predicted. Furthermore, the number of people who have entered the field of study of QTM during these past few years has increased many fi)ld. The time was therefore opportune to hold a Workshop to bring together for the first time the leading researchers of QTM, both theoretical and experimental, so as to discuss the current status of the field. The most controversial issue at the tim
出版日期Book 1995
关键词Experiment; Quantum tunnelling; Rover; magnetism; measurement; simulation; temperature
版次1
doihttps://doi.org/10.1007/978-94-011-0403-6
isbn_softcover978-94-010-4180-5
isbn_ebook978-94-011-0403-6Series ISSN 0168-132X
issn_series 0168-132X
copyrightSpringer Science+Business Media Dordrecht 1995
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Quantum Tunneling of Magnetizationtemperature. The crossover temperature between the two regimes is governed by the magnetic anisotropy constant in ferromagnets, depends on the external magnetic field and is in qualitative agreement with theoretical suggestions on quantum tunneling of magnetization.
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Acoustic and Magnetic Properties of Rare-Earth-Ion-Doped Glasses: Elastic and Magnetic Tunneling Staglasses magnetic tunneling states (MTS), if the dilute ions are magnetic and have Kramers degeneracy [5,6]. The MTS, attributable to the magnetic rare-earth ions, can be explained with the theory of tunneling of large spins having strong anisotropy energy [7–10].
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Monte Carlo Simulations on Reversal Magnetization of Small Clustersh static and dynamical calculations, spins at the cluster edge play a fundamental role. Present results agree with recent experiments on small anisotropic single domain particles, questioning the uniform rotation model of the magnetization.
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Macroscopic Quantum Effects in Magnetic Systems: An Overviewonditions, be represented as occupying not one or other of these states but rather a .: for example, an atom driven by an electromagnetic field may be in a linear combination of its ground (s) state and an excited (p) state, and its properties are then different from what they would be in either sta
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Quantum Spin-Tunneling:A Path Integral Approachassical ground state is removed due to tunneling. The tunnel splitting Δ.. of the ground state is calculated by use of a path integral formalism. It is shown that coherent spin state path integrals do not yield a reasonable result. However a “bosonlzation” of the spin system yields excellent results
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Macroscopic Quantum Tunneling in Ferromagnets and Antiferromagnetsferromagnetic particles. Expressions for the rates of quantum tunneling and thermal activation of the magnetization and the Néel vector are given for low temperatures, near the cross-over temperature and high temperatures. Quantum and thermally activated nucleations in bulk solids and two-dimensiona
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