This article is cited in 5 papers

METHODOLOGICAL NOTES

Pyromagnetic effect in ferrimagnets with a 'weak' sublattice

K. P. Belov

Lomonosov Moscow State University, Faculty of Physics

Abstract: The temperature dependence of the residual and spontaneous magnetization in ferrites with a 'weak' sublattice may be taken as evidence for the pyromagnetic effect — a magnetic analog of the pyroelectric effect — in which the magnetization of a sample increases on cooling in the absence of an external magnetic field. A confirmation of this has been provided by the observation of a thermodynamically inverse phenomenon, the linear magnetocaloric effect, in such ferrites. These effects are due to the unidirectional exchange anisotropy characteristic of ferrimagnets with a weak sublattice.

PACS: 75.50.-y, 75.50.GY, 75.80.+q, 75.90.+w

Received: January 19, 2000

DOI: 10.3367/UFNr.0170.200004f.0447

 English version: Physics–Uspekhi, 2000, 43:4, 407–413

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