Quantum spin tunneling of magnetization in small ferromagnetic particles


Autoria(s): GALETTI, D.; PIMENTEL, B. M.; Lima, Celso Luiz; SILVA, E. C.
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

20/10/2012

20/10/2012

2009

Resumo

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.

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Conselho Nacional de Desenvolvimento Cientifico e Tecnologico, CNPq, Brazil

CAPES, Brazil

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Fundacao de Amparo a Pesquisa do Estado de Sao Paulo, FAPESP, Brazil

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Identificador

PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS, v.388, n.7, p.1105-1110, 2009

0378-4371

http://producao.usp.br/handle/BDPI/29510

10.1016/j.physa.2008.12.044

http://dx.doi.org/10.1016/j.physa.2008.12.044

Idioma(s)

eng

Publicador

ELSEVIER SCIENCE BV

Relação

Physica A-statistical Mechanics and Its Applications

Direitos

restrictedAccess

Copyright ELSEVIER SCIENCE BV

Palavras-Chave #Spin tunneling #Small ferromagnetic particles #MOLECULES #MODEL #Physics, Multidisciplinary
Tipo

article

original article

publishedVersion