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Magnetic properties and magnetocaloric effects of manganite (La_(0.8)Ho_(0.2))_(2/3)Ca_(1/3)MnO_3 and (La_(0.5)Ho_(0.5))_(2/3)Ca_(1/3)MnO_3 被引量：2

Magnetic properties and magnetocaloric effects of manganite (La_(0.8)Ho_(0.2))_(2/3)Ca_(1/3)MnO_3 and (La_(0.5)Ho_(0.5))_(2/3)Ca_(1/3)MnO_3
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摘要 We reported the magnetic properties and magnetocaloric effects(MCE) of(La0.8Ho0.2)2/3Ca1/3MnO3 and(La0.5Ho0.5)2/3Ca1/3MnO3 nanoparticles by sol-gel technique.With this method,we were able to obtain the samples with particle diameters ranging from 50 to 200 nm.In the(La1-xHox)2/3Ca1/3MnO3 compound,an external magnetic field induced a magnetic transition from an paramagnetic phase to a ferromagnetic phase above Ts=105-135 K,leading to magnetocaloric effects.The maximum value of ΔSM was 1.19 J/(kg·K) at 100 K and 2.03 J/(kg·K) at 152 K for a magnetic field change of 5 T.Because both samples had large relative cooling power(RCP) and wide δTFWHM,the study on systems with the(La1-xHox)2/3Ca1/3MnO3-related magnetic transitions may open an important field in searching good magnetic materials. We reported the magnetic properties and magnetocaloric effects(MCE) of(La0.8Ho0.2)2/3Ca1/3MnO3 and(La0.5Ho0.5)2/3Ca1/3MnO3 nanoparticles by sol-gel technique.With this method,we were able to obtain the samples with particle diameters ranging from 50 to 200 nm.In the(La1-xHox)2/3Ca1/3MnO3 compound,an external magnetic field induced a magnetic transition from an paramagnetic phase to a ferromagnetic phase above Ts=105-135 K,leading to magnetocaloric effects.The maximum value of ΔSM was 1.19 J/(kg·K) at 100 K and 2.03 J/(kg·K) at 152 K for a magnetic field change of 5 T.Because both samples had large relative cooling power(RCP) and wide δTFWHM,the study on systems with the(La1-xHox)2/3Ca1/3MnO3-related magnetic transitions may open an important field in searching good magnetic materials.
作者 何宁 祁阳 张彩碚
机构地区 Institute of Materials Physics and Chemistry China Medical University Key Laboratory for Anisotropy and Texture of Materials of Ministry of Education
出处 《Journal of Rare Earths》 SCIE EI CAS CSCD 2010年第S1期413-416,共4页 稀土学报（英文版）
基金 Project supported by the National Natural Science Foundation of China (50572013)
关键词 sol-gel magnetocaloric effects perovsvskites relative cooling power (RCP) rare earths sol-gel magnetocaloric effects perovsvskites relative cooling power (RCP) rare earths
分类号 TG132.2 [一般工业技术—材料科学与工程]
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参考文献17

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二级参考文献6

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Journal of Rare Earths
2010年 第S1期

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