Comment on “Generalized Stoner-Wohlfarth Model and the Non-Langevin Magnetism of Single-Domain Particles” by M. A. Chuev

EMILIO DE BIASI; ROBERTO DANIEL ZYSLER; CARLOS ALBERTO RAMOS; MARCELO KNOBEL

JETP LETTERS

MAIK NAUKA/INTERPERIODICA/SPRINGER

Año: 2008 p. 703 - 706

0021-3640

In this work we analyzed the model by M. A. Chuev recently published [JETP Letters 85, 611-616 (2007)]. Near the blocking temperature we show that the anisotropy corrections always lead to a lower magnetization than the equilibrium value, contrary to the findings in Chuev´s work.  Also we show that the asymptotic high-temperature limit of Chuev´s model is not in agreement with the expected thermodynamic limit. However, even at low-temperature only a careful implementation of this theory can guarantee arriving to the correct result, avoiding some wrong conclusions in Chuev´s work.