Specific heat of amorphous Mn100−xCex alloys

We have measured the specific heat Cp on sputtered amorphous Mn100-xCex alloys for 25# < x# < 79 from 4.2 to 300K using a light-chopped AC method. The Cp/T follows *g + AT2 law below 15 K in each Ce concentration. The *g value increases systematically as a function of x and reaches 0.124J/mol...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2004-05, Vol.272-276, p.72-74
Main Authors: Kikegawa, Shinya, Amakai, Yusuke, Asano, Katsuhiko, Murayama, Shigeyuki, Takano, Hideaki, Obi, Yoshihisa
Format: Article
Language:English
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Summary:We have measured the specific heat Cp on sputtered amorphous Mn100-xCex alloys for 25# < x# < 79 from 4.2 to 300K using a light-chopped AC method. The Cp/T follows *g + AT2 law below 15 K in each Ce concentration. The *g value increases systematically as a function of x and reaches 0.124J/mol K2 for x = 79, suggesting formation of a dense-Kondo and/or heavy-fermion state at low temperature for the Ce-rich side. Large magnetic contribution in Cp has been observed at higher temperature, suggesting existence of large itinerant spin fluctuations.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2003.11.092