Microscopic magnetic and transport properties of La0.7Pb0.3-xSnxMnO3, 0≤x≤0.3:: magnetoresistance and 55Mn, 139La MNR measurements

被引:14
作者
Krivoruchko, VN [1 ]
Pashchenko, VP [1 ]
Medvedev, YV [1 ]
Khartsev, SI [1 ]
Shemyakov, AA [1 ]
Savosta, MM [1 ]
Kamenev, VI [1 ]
Loyko, AD [1 ]
Volkova, GK [1 ]
Volkov, VI [1 ]
机构
[1] Donetsk Phys & Tech Inst, UA-340114 Donetsk, Ukraine
关键词
D O I
10.1016/S0375-9601(98)00374-0
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Electrical resistivity and magnetoresistance (MR) measurements of La0.7Pb0.3-xSnxMnO3, 0 less than or equal to x less than or equal to 0.3, perovskite oxides have been performed for, the first time. We have investigated the polycrystalline patterns and thin films as well. Typically the samples showed fairly large MR (10-15% at H = 1 T) in the temperature range 77-300 K. To find the Pb-Sn-doping effect on the oxide magnetic phase and giant MR, Mn-55 and La-139 nuclear magnetic resonance measurements have been performed. We have found that one can obtain a large MR at room temperature in Pb-Sn-doped LaMnO3 thin films, avoiding the contamination of the perovskite phase. (C) 1998 Elsevier Science B.V.
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收藏
页码:163 / 166
页数:4
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