| Structural Dependence of Magnetic and Transport Properties in Doped Manganite Perovskites |
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| 作者姓名： | 黄云辉 廖春生 严纯华 |
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| 作者单位： | State Key Lab of Rare Earth Materials Chemistry and Applications，PKU-HKU Joint Lab in Rare Earth Materials and Bioinorganic Chemistry，College of Chemistry and Molecular Engineering，Peking University，B |
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| 基金项目： | This work was supported by MOST of China (G19980613)，NSFC (Nos. 29831010 & 20023005)，the Post-Doctoral Foundation of China，the Founder Foundation of PKU Corresponding author. |
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| 摘 要： | 1 INTRODUCTION In recent years, ABO3-type perovskite-like manganites, RE1xDxMnO3 (RE = rare earth ions, D = Ca2+, Sr2+, Ba2+ etc.), have inspired remarkable attention due to the colossal magnetoresistance (CMR) effects for fundamental and practical consideration 1, 2]. Since A- and B-site substitution can give rise to a large number of derivant compounds, fruitful structural, magnetic and transport properties would be expected in this family. As we have known, the ideal ABO3-typ…
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| 关 键 词： | 亚锰酸盐 结构畸变 碳性 传输性质 掺杂 |
Structural Dependence of Magnetic and Transport Properties in Doped Manganite Perovskites |
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| Abstract: | In this paper, the magnetic and transport properties in ABO3-type perovskite-like manganites as functions of the structure have been discussed from the viewpoints of A- and B-site doping, respectively. For the A-site doping, two simple parameters, tolerance factor t and variance of the A-cation radius distribution s, can be used to characterize the magnetic/resistive phase diagram. For the B-site doping, the case is complicated due to the direct action to the center of double exchange. However, the dopant-size-induced local strain effect plays an important role in the physical properties besides the size mismatch between A- and B-site ions. |
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| Keywords: | magnetically ordered materials structural distortion magnetoresistance |
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