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Ferrimagnets with a ’weak’ magnetic sublattice


Lomonosov Moscow State University, Faculty of Physics, Leninskie Gory 1 build. 2, Moscow, 119991, Russian Federation

Measurements on the anomalous temperature behaviour of the spontaneous magnetisation in various ferrimagnets (N-, M-, and P-type Neel curves) are analysed and summarised. The concept of a ’weak’ magnetic sublattice is applied to explain the anomalies as well as manifestations of the ’low-temperature point’ TB and the antiferromagnetic-type paraprocess. The paraprocess phenomenon causes sign anomalies in the magnetocaloric effect, magnetostriction, and the ’first’ component of the isotropic magnetoresistance. It is suggested that in magnetite (Fe3O4) the role of a ’weak’ sublattice is played by the spin-ordered subsystem of hopping electrons (’magnetoelectron’ sublattice), and the appearing point TB is nothing else but the low-temperature transformation point Tt(100-120 K).

Fulltext pdf (684 KB)
Fulltext is also available at DOI: 10.1070/PU1996v039n06ABEH000153
PACS: 63.90.+t, 75.25.+z, 75.40.−s, 75.50.Gg (all)
DOI: 10.1070/PU1996v039n06ABEH000153
URL: https://ufn.ru/en/articles/1996/6/f/
A1996UZ88800006
Citation: Belov K P "Ferrimagnets with a 'weak' magnetic sublattice" Phys. Usp. 39 623–634 (1996)
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Оригинал: Белов К П «Ферримагнетики со „слабой“ магнитной подрешеткой» УФН 166 669–681 (1996); DOI: 10.3367/UFNr.0166.199606f.0669

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