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The Intra‐ and Intersublattice Exchange Interactions in RFe 12 x T x Intermetallics
Author(s) -
Stefański P.,
Szlaferek A.,
Wrzeciono A.
Publication year - 1989
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221560229
Subject(s) - intermetallic , coupling constant , curie temperature , field (mathematics) , rare earth , curie , series (stratigraphy) , mean field theory , coupling (piping) , exchange interaction , crystallography , chemistry , materials science , constant (computer programming) , condensed matter physics , physics , analytical chemistry (journal) , ferromagnetism , mineralogy , mathematics , metallurgy , quantum mechanics , geology , paleontology , alloy , chromatography , pure mathematics , computer science , programming language
The experimental values of Curie temperatures of RFe 12− x T x (R = rare earth, T = V, Ti, Si, Cr) are used to calculate the effective exchange coupling constants in iron sublattice and between rare earth and iron sublattices. A mean field approximation is used. Values of molecular field, B mol , acting on the rare earth ion are also established. The coupling constant in Fe sublattice is found to be the largest for T = V; J FeFe = 10.14 × 10 −22 J. The molecular field has its maximum value for R = Sm in each series of RFe 12− x T x compounds.
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