K dopant effect on La0.7KxCa0.3-xMnO3 (x=0, 0.05, 0.1) perovskite compounds: the structural, magnetic and magnetocaloric properties

被引：0

作者：

Tekgul, Atakan ^{[1
]}

Unlu, Cumhur Gokhan ^{[2
]}

Sarlar, Kagan ^{[1
,3
]}

Kucuk, Ilker ^{[1
]}

机构：

[1] Uludag Univ, Fac Arts & Sci, Phys Dept, TR-16059 Bursa, Turkey

[2] Pamukkale Univ, Dept BioMed Engn, TR-20070 Denizli, Turkey

[3] Karamanoglu Mehmetbey Univ, Kamil Ozdag Sci Fac, Phys Dept, TR-70100 Karaman, Turkey

来源：

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS | 2020年 / 31卷 / 09期

关键词：

ENTROPY CHANGE; FE;

D O I：

10.1007/s10854-020-03249-2

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

La0.7KxCa0.3-xMnO3 (x = 0, 0.05, 0.1) perovskites were prepared by sol-gel method. The K-doped effect was determined by the structural, magnetic, and magnetocaloric properties of the compounds. In the crystal structure of K-doped La0.7Ca0.3MnO3, Mn-O-Mn bond angle slightly increases with K addition. The transition shifts the range of 270-320 K when the K is added in La0.7Ca0.3MnO3. The Curie temperature increases from 251 to 288 K with increasing K amount. The maximum magnetic entropy change was found to be 2.7 J kg(-1) K-1 at 283 K under a magnetic field change of 2 T for the La0.7K0.05Ca0.25MnO3. The relative cooling powers (RCPs) in the La0.7KxCa0.3-xMnO3 (x = 0, 0.05, 0.1) samples were calculated to be 103, 133 and 88 J kg(-1), respectively.

引用

页码：6875 / 6882

页数：8

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