Spin-phonon avalanches in Mn12 acetate

被引：41

作者：

del Barco, E

Hernandez, JM

Sales, M

Tejada, J

Rakoto, H

Broto, JM

Chudnovsky, EM

机构：

[1] Univ Barcelona, Dept Fis Fonamental, E-08028 Barcelona, Spain

[2] Inst Natl Sci Appl, SNCMP, F-31077 Toulouse, France

[3] CUNY Herbert H Lehman Coll, Dept Phys, Bronx, NY 10468 USA

来源：

PHYSICAL REVIEW B | 1999年 / 60卷 / 17期

关键词：

D O I：

10.1103/PhysRevB.60.11898

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report experimental studies and suggest a quantitative model of spin relaxation in Mn-12 acetate in a pulsed magnetic field in the temperature range 1.9-5.0 K. When the field applied along the anisotropy axis is swept at 140 T/s through a nonmagnetized Mn-12 acetate sample, the sample's magnetization switches, within a few milliseconds, from zero to saturation at a well-defined field whose value depends on temperature but is quantized in units of 0.46 T. A quantitative explanation of the effect is given in terms of a spin-phonon avalanche combined with thermally assisted resonant spin tunneling. [S0163-1829(99)11529-7].

引用

收藏

页码：11898 / 11901

页数：4

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