Tunneling rate for superparamagnetic particles by the instanton method

We derive the tunneling rate for paramagnetic molecules in the context of a collective spin model. By means of path integral methods, an analytical expression is derived. Given the very large spins in question (s∼3000ℏ), the observation of magnetization changes due to pure unitary tunnel effects is unlikely.

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Year of publication:	2002
Authors:	Martins Ferreira, E.H. ; Nemes, M.C.
Published in:	Physica A: Statistical Mechanics and its Applications. - Elsevier, ISSN 0378-4371. - Vol. 310.2002, 3, p. 435-449
Publisher:	Elsevier
Subject:	Macroscopic tunneling \| Instanton \| Functional integral \| Superparamagnetism

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Type of publication:	Article
Source:	RePEc - Research Papers in Economics

Persistent link: https://www.econbiz.de/10011058117