Journal of the Physical Society of Japan
Online ISSN : 1347-4073
Print ISSN : 0031-9015
ISSN-L : 0031-9015
Low Temperature Specific Heat of Nearly and Weakly Ferromagnetic Y(Co1−xAlx)2
Hirofumi Wada, Masayo Hada, Keiichi N. Ishihara, Masayuki Shiga, Yoji Nakamura
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Keywords: low temperature specific heat, Laves phase, Y(Co1−xAlx)2, nearly ferromagnetic metals, weak ferromagnetism, spin fluctuations
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1990 Volume 59 Issue 8 Pages 2956-2962

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Abstract

The low temperature specific heat of nearly and weakly ferromagnetic Y(Co1−xAlx)2 with 0≤x≤0.18 is studied between 1.4 K and 6.5 K. The results show an enhancement of the electronic specific heat coefficient, γ, around the critical concentration for ferromagnetism. A strong upturn in the C⁄T vs T2 curve at low temperatures is observed for x≥0.09. The origin of this upturn is discussed in terms of different models so far proposed.

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