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| Magnetic and Transport Properties of La0.5-x Ndx Ba0.5 CoO3 Compounds | |
| 引用本文： | 张汝贞,刘宜华,王成建,黄宝歆,季刚,梅良模. Magnetic and Transport Properties of La0.5-x Ndx Ba0.5 CoO3 Compounds[J]. 中国稀土学报(英文版), 2003, 21(5): 558-562 |
| 作者姓名： | 张汝贞 刘宜华 王成建 黄宝歆 季刚 梅良模 |
| 作者单位： | SchoolofPhysicsandMicroelectronics,ShandongUniversity,Jinan250100,China |
| 基金项目： | ProjectsupportedbytheStateKeyProjectofFundamentalResearch (G19980 613 0 10 )andtheNationalScientificandTechnologicalDepartmentofChina |
| 摘 要： | Substituting effects of Nd for La in La0.5Ba0.5CoO3 compounds were studied systematically. The results show that Nd doping does not change the itinerant properties of the Co3d electrons. The molecular magnetic moment of the mate-rials decreases monotonically with increasing Nd dopant. When Nd content x ≥0.45, a magnetic phase separation appears in the materials. When x ≤0.45, the Curie temperature decreases monotonically with increasing Nd dopant. This is due to the size effects of the rare earth ions. The electric resistance measurements show that in the studied temperature range, the conduction of the materials belongs to the thermo-diffusion conduction below the Curie temperature, while it belongs to the variable range hopping conduction of polarons over the Curie temperature. |
| 关 键 词： | 稀土复合物 尺寸效应 电荷转变 磁性能 转变特性 |
Magnetic and Transport Properties of La0.5-xNdxBa0.5CoO3 Compounds |
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| Zhang Ruzhen ,Liu Yihua,Wang Chengjian,Huang Baoxin,Ji Gang,Mei Liangmo. Magnetic and Transport Properties of La0.5-xNdxBa0.5CoO3 Compounds[J]. Journal of Rare Earths, 2003, 21(5): 558-562 | |
| Authors: | Zhang Ruzhen Liu Yihua Wang Chengjian Huang Baoxin Ji Gang Mei Liangmo |
| Affiliation: | Zhang Ruzhen *,Liu Yihua,Wang Chengjian,Huang Baoxin,Ji Gang,Mei Liangmo |
| Abstract: | Substituting effects of Nd for La in La0.5Ba0.5CoO3 compounds were studied systematically. The results show that Nd doping does not change the itinerant properties of the Co3d electrons. The molecular magnetic moment of the materials decreases monotonically with increasing Nd dopant. When Nd content x≥0.45, a magnetic phase separation appears in the materials. When x≤0.45, the Curie temperature decreases monotonically with increasing Nd dopant. This is due to the size effects of the rare earth ions. The electric resistance measurements show that in the studied temperature range, the conduction of the materials belongs to the thermo-diffusion conduction below the Curie temperature, while it belongs to the variable range hopping conduction of polarons over the Curie temperature. |
| Keywords: | metal materials La 0.5- x Nd x Ba 0.5 CoO 3 compounds size effect itinerant electrons charge transfer rare earths |
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