Eur. Phys. J. B 70, 369-375 (2009)
https://doi.org/10.1140/epjb/e2009-00246-8

Magnetic hysteresis in a molecular Ising ferrimagnet: Glauber dynamics approach

¹ Department of Physics, Ural State University, Ekaterinburg, 620083, Russia
² Institute of Metal Physics RAS and Ural State University, Ekaterinburg, 620083, Russia
³ Institute for Advanced Materials Research, Hiroshima University, Hiroshima, Japan

Corresponding author: ^a alexander.ovchinnikov@usu.ru

Received: 11 February 2009
Revised: 6 June 2009
Published online: 15 July 2009

Abstract

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.