Magnetic hysteresis in a molecular Ising ferrimagnet: Glauber dynamics approach

Details Magnetic hysteresis in a molecular Ising ferrimagnet: Glauber dynamics approach Magnetic hysteresis in a molecular Ising ferrimagnet: Glauber dynamics approach

2009-07-08

arxiv.org/abs/0907.1348v1

Physics

Condensed Matter

Statistical Mechanics

16 pages, 6 figures

Scientific paper

Motivated by recent experimental results reporting giant coercive fields in Co(II)-based molecular magnets we present a theory of hysteresis phenomena based on the Glauber stochastic dynamics. Unusual form of hysteresis loops is similar to those of found in Co-based quasi-one-dimensional ferrimagnet CoPhOMe at low temperatures. Temperature dependence of the coercive field has a characteristic form with an inflection that may serve as an indicator of the Glauber dynamics in real compounds. A relevance of the model for other Co-based molecular magnets is discussed.

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