Synthesis and magnetocaloric properties of La0.7Ca0.3MnO3 nanoparticles with different sizes
Synthesis and magnetocaloric properties of La0.7Ca0.3MnO3 nanoparticles with different sizes
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不同尺寸La0.7Ca0.3MnO3纳米粒子的合成及磁热性能
DOI:
10.1016/j.jallcom.2012.11.200
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发表时间:
2013-04
影响因子:
6.2
通讯作者:
朱彦虎(研究生)
中科院分区:
文献类型:
--
作者:
杨华;朱彦虎(研究生)
La0.7Ca0.3MnO3nanoparticles 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 50nm, 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 TCis observed to be 260K for sample S1 and 267K for sample S4. The nature of the magnetic phase transition at TCis 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 15kOe is obtained to be 1.01 and 1.20Jkg−1K−1for samples S1 and S4, respectively.
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DOI:
10.1088/0022-3727/43/13/135001
发表时间:
2010-04
期刊:
Journal of Physics D: Applied Physics
影响因子:
--
作者:
P. Nisha;S. S. Pillai-S.;A. Darbandi;A. Misra;K. G. Suresh;Manoj Raama Varma;H. Hahn
通讯作者:
P. Nisha;S. S. Pillai-S.;A. Darbandi;A. Misra;K. G. Suresh;Manoj Raama Varma;H. Hahn
影响因子:
2.5
作者:
Spasojevic, Vojislav;Mrakovic, Ana;Blanusa, Jovan
通讯作者:
Blanusa, Jovan
影响因子:
2.7
作者:
Tang, Wei;Lu, Wenjian;Sun, Yuping
通讯作者:
Sun, Yuping
影响因子:
3.2
作者:
Wenjian Lu;X. Luo;C. Hao;W. Song;Y. Sun
通讯作者:
Wenjian Lu;X. Luo;C. Hao;W. Song;Y. Sun
DOI:
10.1016/0031-9163(64)91158-8
发表时间:
1964-01-01
期刊:
PHYSICS LETTERS
影响因子:
--
作者:
BANERJEE, SK
通讯作者:
BANERJEE, SK