Synthesis, characterisation and study of magnetocaloric properties of La0.65Sr0.25K0.1Mn1-xVxO3

2018 International Conference on Advanced Materials, Intelligent Manufacturing and Automation

材料科学;机械制造;运输工程

Kong, Xiangyu^1 ; Zou, Zhengguang^1

Key Laboratory of Non-ferrous Materials and New-Processing Technology, Ministry of Education, College of Material Science and Engineering, Guilin University of Technology, 541004, China^1

关键词: C-space;    Magnetic entropy change;    Magnetic field variations;    Magnetization data;    Magnetocaloric properties;    Paramagnetic-ferromagnetic phase transitions;    Polycrystalline perovskite;    Single phase;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/382/2/022058/pdf
DOI  :  10.1088/1757-899X/382/2/022058

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Polycrystalline perovskite-type manganite La0.65Sr0.25K0.1MnxV1-xO3 were prepared by sol-gel method. An X-ray diffraction at room temperature indicated that all samples have a single phase with R-3c space group. Magnetic properties and Curie temperature are measured by superconducting quantum interference device. Magnetization as a function of temperature shows that all samples exhibit a paramagnetic-ferromagnetic phase transition at the Curie temperature. The Curie temperature of samples was increased from 342 K for x=0.00 to 351 K for x=0.15. The magnetic entropy change deduced from the measured magnetization data using Maxwell relation. The maximum magnetic entropy change -ΔSM corresponding to a 1 T magnetic field variation was found to be 1.0 J/kg K for x=0.05. The style of phase transition of the manganite was distinguished by Banerjee criteria.