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The magnetic properties of DyFe 2 Si 2 and its crystal‐field levels
Author(s) -
Liu Z.S.,
Diviš M.,
Sechovský V.
Publication year - 2009
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.200844491
Subject(s) - magnetization , condensed matter physics , field (mathematics) , crystal (programming language) , magnet , magnetic field , ion , chemistry , atmospheric temperature range , physics , thermodynamics , mathematics , quantum mechanics , pure mathematics , computer science , programming language
We used a two‐ion model to derive analytic formulas for the magnetization of DyFe 2 Si 2 with its lowest crystal‐field (CF) states in the presence of an external field exerted in the easy c and hard a directions, respectively, and then evaluated the initial spontaneous magnetization and the Néel temperature of the magnet with the formulas obtained. In comparison with experimental data, our theoretical results suggest that the magnetic process along the easy axis is dominated by the two lowest CF states in the temperature range at least up to 20 K, but the magnetic behaviour in the hard a direction is governed by the six states of the three lowest CF doublets. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)