期刊
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
卷 388, 期 7, 页码 1105-1110出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physa.2008.12.044
关键词
Spin tunneling; Small ferromagnetic particles
资金
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico, CNPq, Brazil
- CAPES, Brazil
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo, FAPESP, Brazil
An approach is presented that can also account for the description of small ferromagnetic particle magnetization tunneling. An estimate of the saturation value of an external applied magnetic field along the easy axis is obtained. An analytic expression for the tunneling factor in the absence of an external magnetic field is deduced from the present approach that also allows one to obtain the crossover temperature characterizing the regime where tunneling is dominated by quantum effects. (C) 2009 Published by Elsevier B.V.
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