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Negative Magnetoresistance Effect in La-Pb-Mn-O Bulk Manganese Oxides |
| ZHAO Tong-yun;LI Min;ZHAO Xue-gen;WANG Fang-wei;LI Yun-fei;SHEN Bao-gen;ZHAO Jian-gao
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| State Key Laboratory of Magnetism, institute of Physics, Academia Sinica, Beijing 100080 |
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| Cite this article: |
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ZHAO Tong-yun, LI Min, ZHAO Xue-gen et al 1996 Chin. Phys. Lett. 13 129-132 |
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Abstract The structure. magnetic and magnetotransport properties of La1-xPbxMnO bulk manganese oxides prepared by the standard ceramic techniques were investigated by XRD. VSM, ESM and MR measurements. The sintering condition and the hole doped concentration x have a strong influence on the magnetic properties and magnetoresistance effect. The maximum MR, 20% at room temperature under a field of 2T, was obtained for x= 0.4 and the sintered temperature Ts = 1260°C. The correlation among the structure, magnetic and MR is discussed.
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| Keywords:
72.15.Gd
75.20.Hr
76.30.Kg
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Published: 01 February 1996
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| PACS: |
72.15.Gd
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(Galvanomagnetic and other magnetotransport effects)
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75.20.Hr
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(Local moment in compounds and alloys; Kondo effect, valence fluctuations, heavy fermions)
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76.30.Kg
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(Rare-earth ions and impurities)
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