Magnetocaloric effect at room temperature in manganese perovskite La_(0.65)Nd_(0.05)Pb_(0.3)MnO_3 with double resistivity peaks

Zhiming Wang; Qingyu Xu; He Zhang

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Magnetocaloric effect at room temperature in manganese perovskite La_(0.65)Nd_(0.05)Pb_(0.3)MnO_3 with double resistivity peaks

机译：钙钛矿型La_（0.65）Nd_（0.05）Pb_（0.3）MnO_3在室温下的磁热效应

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摘要

Series of polycrystalline manganese perovskite oxides La_(0.7-x)Nd_xPb_(0.3)MnO_3 (x = 0, 0.05, and 0.1) are prepared by the sol-gel technique, La_(0.65)Nd_(0.65)Pb_(0.3)MnO_3 were representatively investigated because the peculiar double resistivity peaks were found; the maximum magnetic entropy change AS_H= — 2.03 J/kg K and its good refrigerant capacity 71.05 J/kg around room temperature were obtained under 9 kOe magnetic field variation. The expected double peaks of magnetocaloric effect had not occurred since magnetic entropy change originated from the differential coefficient of magnetic moment to temperature; the relatively well refrigerant capacity possibly results from the faint magnetic inhomogeneity mixed in the double exchange strong magnetic signal.

机译：通过溶胶-凝胶技术制备了一系列多晶钙钛矿锰氧化物La_（0.7-x）Nd_xPb_（0.3）MnO_3（x = 0、0.05和0.1），La_（0.65）Nd_（0.65）Pb_（0.3）MnO_3具有代表性的研究是因为发现了独特的双电阻率峰值；在9 kOe磁场变化下，室温下的最大磁熵变AS_H = — 2.03 J / kg K，制冷剂的良好制冷量为71.05 J / kg。由于磁熵的变化是由磁矩与温度的微分系数引起的，因此没有出现预期的磁热效应双峰。相对较好的制冷剂容量可能是由于在双重交换强磁信号中混合的微弱磁不均匀性造成的。

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来源
《Journal of magnetism and magnetic materials》 |2011年第24期|p.3229-3233|共5页
作者
Zhiming Wang; Qingyu Xu; He Zhang;
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作者单位

Institute of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China ,Department of Physics, Southeast University, Nanjing 211189, China;

Department of Physics, Southeast University, Nanjing 211189, China;

Institute of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China;

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正文语种 eng
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关键词
perovskite manganite; double metal-insulator peak; magnetocaloric effect at room temperature;

机译：钙钛矿锰矿;双金属绝缘峰室温下的磁热效应;

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1. Magnetocaloric Effect in Perovskite Manganite La_(0.65)Nd_(0.05)Ba_(0.3)MnO_3 with Double Metal-Insulator Peaks [J] . Zhiming Wang, Gang Ni, Yulu Che Journal of Superconductivity and Novel Magnetism . 2012,第2期

机译：具有双重金属-绝缘峰的钙钛矿锰矿La_（0.65）Nd_（0.05）Ba_（0.3）MnO_3的磁热效应
2. Tuning magnetic and magnetocaloric properties around room temperature via chromium substitution in La_(0.65)Nd_(0.05)Ba_(0.3)MnO_3 system [J] . Mahjoub Saoussen, Mnassri Rafik, Baazaoui Mohamed, Journal of magnetism and magnetic materials . 2019,第JULa期

机译：在La_（0.65）Nd_（0.05）Ba_（0.3）MnO_3系统中通过铬置换来调节室温附近的磁和磁热性质
3. Magnetic entropy change in perovskite manganites La_(0.6)Pr _(0.1)Pb_(0.3)MnO_3 with double metalinsulator peaks [J] . Wang Z., Xu Q., Ni G., Physica, B. Condensed Matter . 2011,第23期

机译：钙钛矿型锰矿La_（0.6）Pr _（0.1）Pb_（0.3）MnO_3具有双金属绝缘峰的磁熵变
4. SYNTHESIS OF MAGNETIC PROPERTIES IN COMPOSITES La_(0.7)Pb_(0.3)MnO_3/Ag AND La_(0.7)Pb_(0.3)MnO_3/Fe_2O_3 [C] . S.L. Young, H.Z. Chen, J.Y. Shen International SAMPE Symposium Exhibition . 2001

机译：复合材料中磁性性能的合成La_（0.7）Pb_（0.3）MnO_3 / Ag和La_（0.7）Pb_（0.3）MnO_3 / Fe_2O_3
5. Magnetic and Magnetocaloric Properties of Monovalent Substituted La0.65M0.3M ′ 0.05MnO3 (M=Ba, Ca and M ′ =Na, Ag, K) Perovskite Manganites [O] . Koubaa M., Cheikhrouhou Koubaa W., Cheikhrouhou A. 2009

机译：一价取代的La0.65M0.3M'0.05MnO3（M = Ba，Ca和M'= Na，Ag，K）钙钛矿锰矿的磁和磁热性质

Magnetocaloric effect at room temperature in manganese perovskite La_(0.65)Nd_(0.05)Pb_(0.3)MnO_3 with double resistivity peaks

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