Magnetic Foehn Effect in Nonadiabatic Transition

Abstract

The magnetization curves as a response of sweeping magnetic field in the thermal environment are investigated using the quantum master equation. In a slow velocity region where the system almost behaves adiabatically, the magnetic plateau appears which has been observed in the recent experiment of V${}_{15}$ [ Phys. Rev. Lett. (2000)]. We investigate its mechanism and propose that this phenomenon is quite universal in the quasi-adiabatic transition with small inflow of the heat, and we call it 'Magnetic Foehn Effect'. We observe the crossover between this mechanism and the Landau-Zener-Stückelberg mechanism changing the velocity. Some experiment is proposed to clarify the inherent mechanism of this effect.

4 pages including 4 figures

References in corpus (2)

• Butterfly hysteresis loop and dissipative spin reversal in the S=1/2, V15 molecular complex
• Local magnetic structure due to inhomogeneity of interaction in S=1/2 antiferromagnetic chain

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