Synthesis and magnetocaloric properties of La0.7Ca 0.3MnO3 nanoparticles with different sizes

doi:10.1016/j.jallcom.2012.11.200

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	Synthesis and magnetocaloric properties of La0.7Ca 0.3MnO3 nanoparticles with different sizes
	Yang, H.1,2; Zhu, Y.H.1; Xian, T.1,2; Jiang, J.L.1
刊名	Journal of Alloys and Compounds
	2013-04-05
卷号	555 页码:150-155
关键词	Chelation Lanthanum compounds Magnetocaloric effects Manganese compounds Nanoparticles Oxalic acid Particle size Synthesis (chemical) Applied magnetic fields Average particle size Chelating agent Ferromagnetic transition temperatures Magnetic entropy change Magnetic phase transitions Magnetocaloric properties Polyacrylamide gel routes
ISSN号	09258388
DOI	10.1016/j.jallcom.2012.11.200
英文摘要	La0.7Ca0.3MnO3 nanoparticles with different average sizes were prepared via a polyacrylamide gel route, where the particle size was tailored by using different chelating agents. The samples prepared by using the chelating agents acetic acid (S1), oxalic acid (S2), citric acid (S3) and EDTA (S4) have an average particle size of 30, 37, 45 and 50 nm, respectively. The as-prepared particles are regularly shaped like spheres. Magnetocaloric properties of samples S1 and S4 that respectively have the smallest and largest particle size were systematically investigated. The paramagnetic-ferromagnetic transition temperature TC is observed to be 260 K for sample S1 and 267 K for sample S4. The nature of the magnetic phase transition at TC is determined to be second order. The magnetic entropy change is found to be extended over a wide range of temperature around TC, and its maximum value at an applied magnetic field of 15 kOe is obtained to be 1.01 and 1.20 J kg-1 K-1 for samples S1 and S4, respectively. © 2012 Elsevier B.V. All rights reserved.
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	Elsevier Ltd
WOS记录号	WOS:000314909700026
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/113184]
专题	省部共建有色金属先进加工与再利用国家重点实验室理学院
作者单位	1.School of Science, Lanzhou University of Technology, Lanzhou 730050, China 2.State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, China;
推荐引用方式 GB/T 7714	Yang, H.,Zhu, Y.H.,Xian, T.,et al. Synthesis and magnetocaloric properties of La0.7Ca 0.3MnO3 nanoparticles with different sizes[J]. Journal of Alloys and Compounds,2013,555:150-155.
APA	Yang, H.,Zhu, Y.H.,Xian, T.,&Jiang, J.L..(2013).Synthesis and magnetocaloric properties of La0.7Ca 0.3MnO3 nanoparticles with different sizes.Journal of Alloys and Compounds,555,150-155.
MLA	Yang, H.,et al."Synthesis and magnetocaloric properties of La0.7Ca 0.3MnO3 nanoparticles with different sizes".Journal of Alloys and Compounds 555(2013):150-155.