Magnetic Foehn Effect in Adiabatic Transition

Keiji Saito, Seiji Miyashita

研究成果: Article査読

43 被引用数 (Scopus)


The magnetization process as a response to a sweeping magnetic field in the thermal environment is investigated by using the quantum master equation. In a slow sweeping velocity region where the system shows quasi-adiabatic motion, a magnetic plateau in the magnetization process has been observed in the recent experiment of V15, [Phys. Rev. Lett. 84 (2000) 3454]. Although the experiment was explained from a view of small capacity of the phonon heat bath, i.e., the phonon bottleneck effect, we found that a magnetic plateau appears almost regardless of the properties of the heat bath in the quasi-adiabatic transition and the appearance of the plateau is quire universal. We call it 'Magnetic Foehn effect'. On the other hand, the magnetic plateau also appears in a fast sweeping velocity region by the Landau-Zener-Stückelberg mechanism which is different from the above mechanism in a slow sweeping region, and we study the crossover between them. We also propose an experiment which clarifies the structure of coupling to the thermal reservoir.

ジャーナルJournal of the Physical Society of Japan
出版ステータスPublished - 2001 11

ASJC Scopus subject areas

  • 物理学および天文学(全般)


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