A Phenomenological Theory of Metamagnetism in Ce-Based Heavy Fermion Compounds

A phenomenological theory is developed for the metamagnetism observed in heavy Fermion compounds by extension of the Landau theory for phase transitions. From simple analysis, the crossover behavior in high magnetic fields is indicated for the extended Landau-type free energy density. According to t...

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Bibliographic Details
Published in:Journal of low temperature physics 2016-04, Vol.183 (1-2), p.50-58
Main Authors: Matsumoto, K., Kosaka, S., Murayama, S.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Condensed Matter Physics
Crossovers
Density
Fermions
Free energy
Low temperature physics
Magnetic fields
Magnetic Materials
Magnetism
Mathematical analysis
Phase diagrams
Physics
Physics and Astronomy
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Summary:A phenomenological theory is developed for the metamagnetism observed in heavy Fermion compounds by extension of the Landau theory for phase transitions. From simple analysis, the crossover behavior in high magnetic fields is indicated for the extended Landau-type free energy density. According to the finite temperature behavior of the extended Landau free energy density, theoretical magnetic phase diagrams that resemble those observed in CeRu 2 Si 2 and Ce(Ru 0.92 Rh 0.08 ) 2 Si 2 are obtained by using two sets of parameters, respectively.
ISSN:0022-2291
1573-7357
DOI:10.1007/s10909-016-1498-8