Critical phenomena and estimation of the spontaneous magnetization by the analysis of the magnetic entropy change for the Nd_0.6Sr_0.3Ca_0.1Mn_0.975Fe_0.025O₃ manganite

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• 作者：M.R. Laouyenne^a ; M. Baazaoui^a ; ^{medbaazaoui@yahoo.fr} ; Sa. Mahjoub^a ; E.K. Hlil^b ; M. Oumezzine^a
• 关键词：Critical phenomena ; Magnetic entropy change
• 刊名：Journal of Molecular Structure
• 出版年：2017
• 出版时间：15 February 2017
• 年：2017
• 卷：1130
• 期：Complete
• 页码：71-79
• 全文大小：2286 K
• 卷排序：1130

文摘

The compound undergoes a second order phase transition from ferromagnetic to paramagnetic state. The critical exponents values agree strongly with that of Mean field model. A wonderful magnitude coincidence between the magnetic entropy change using the Maxwell relation and the Landau theory. The perfect estimation of β by the Landau theory ensure the validly of this technique to calculate β exponent value.