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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 873Critical Behavior of Gd5Si2Ge1.9Ga0.1 near the...

Critical Behavior of Gd₅Si₂Ge_1.9Ga_0.1 near the Ferromagnetic-Paramagnetic Phase Transition

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Abstract:

The critical behavior near the ferromagnetic-paramagnetic phase transition in Gd₅Si₂Ge_1.9Ga_0.1 has been investigated using a method based on the field dependence of isothermal entropy change. The reliability of the critical exponents determined in such a way has been examined through various techniques, like constructing the modified Arrott plot, applying the scaling law on the isothermal magnetization curves, and comparing the values with those obtained from the Kouvel-Fisher model. The resulting values of the exponents were estimated to be = 0.45(2), = 1.31(5), = 3.9(2) and = 0.69(1), close to the values predicted by the mean field theory. Hence, we concluded that the exchange interaction is of long-range type.

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The Eighth China National Conference on Functional Materials and Applications

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Periodical:

Advanced Materials Research (Volume 873)

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855-860

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https://doi.org/10.4028/www.scientific.net/AMR.873.855

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Online since:

December 2013

Authors:

Zeng Ru Zhao*, Gao Feng Wang, Xue Feng Zhang

Keywords:

Critical Exponent, Gd₅Si₂Ge_1.9Ga_0.1, Isothermal Entropy Change, Phase Transition

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