期刊
AIP ADVANCES
卷 8, 期 5, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.5007285
关键词
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资金
- Vietnam National Foundation for Science and Technology Development (NAFOSTED) [103.02-2015.06]
- Belarusian Repulican Foundation for Fundamental Research [F15-MS016]
- National Research Foundation of Korea (BRFFR-NRFK project) [F16Kor-002, 2016K2A9A1A06920247]
In this work, we point out that the width and the nature of the magnetic phase transition, T-C value, and as well as magnetocaloric effect in La0.7-xSmxCa0.3MnO3 compounds can be easily modified through Sm-doped into La-site. With an increasing Sm concentration, a systematic decrease in the magnetization, T-C, and magnetic entropy change (Delta S-m) are observed. The Arrott-plot proveds that the samples with x = 0 and 0.1 undergoing a first-order phase transition. Meanwhile, sample x = 0.2 undergoes a second-order phase transition, which exhibits a high value of the relative cooling power (81.5 J/kg at Delta H = 10 kOe). An analysis of the critical behavior based on the modified Arrott plots method has been done for sample x = 0.2. The results proved a coexistence of the long-and short-range interactions in La0.5Sm0.2Ca0.3MnO3 compound. (C) 2017 Author(s).
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