Possible 2$\frac{1}{2}$-order magnetic phase transition in the Gd$_{1-x}$Yx system

The magnetic phase transition “helical antiferromagnet-ferromagnet” in the Gd0.66Y0.34 and Gd0.65Y0.35 samples was examined by means of the specific heat, resistivity and magnetic susceptibility vs. temperature. The characteristic anomaly on the temperature dependence of the specific heat suggests t...

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Bibliographic Details
Published in:Europhysics letters 2008-05, Vol.82 (4)
Main Authors: Andrianov, A. Vl, Savelieva, O. A.
Format: Article
Language:English
Subjects:
71.18.+y
75.25.+z
75.30.Kz
Online Access:Get full text
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Summary:The magnetic phase transition “helical antiferromagnet-ferromagnet” in the Gd0.66Y0.34 and Gd0.65Y0.35 samples was examined by means of the specific heat, resistivity and magnetic susceptibility vs. temperature. The characteristic anomaly on the temperature dependence of the specific heat suggests that this phase transition in both the samples is not a second-order phase transition as might be expected, but a so-called second-and-a-half$\hbox{--}$order phase transition. The phenomenon is due to the change in the Fermi surface topology with temperature that is also responsible for the change in the magnetic structure.
ISSN:0295-5075
1286-4854
DOI:10.1209/0295-5075/82/47012