Volume 51, Number 2, July 2000
|Page(s)||216 - 222|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 September 2002|
First- and second-order transitions of the escape rate in ferrimagnetic or antiferromagnetic particles
Department of Physics, Sejong University - Seoul 143-747, Republic of Korea
Accepted: 18 May 2000
Quantum-classical escape rate transition has been studied for two general forms of magnetic anisotropy in ferrimagnetic or antiferromagnetic particles. It is found that the range of the first-order transition is greatly reduced as the system becomes ferrimagnetic and there is no first-order transition in almost compensated antiferromagnetic particles. These features can be tested experimentally in nanomagnets like molecular magnets.
PACS: 75.50.Xx – Molecular magnets / 75.45.+j – Macroscopic quantum phenomena in magnetic systems / 03.65.Sq – Semiclassical theories and applications
© EDP Sciences, 2000
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