Effect of strontium deficiency on the transport and magnetic properties of Pr0.7Sr0.3MnO3
Effect of strontium deficiency on the transport and magnetic properties of Pr0.7Sr0.3MnO3
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DOI：
10.1016/s0304-8853(01)00273-6
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发表时间：
2001-08-01
影响因子：
2.7
通讯作者：
Shimizu, K
中科院分区：
文献类型：
--
作者：
Abou-Ras, D;Boujelben, W;Shimizu, K
对x小于或等于0.2的Pr0.7Sr0.3(X)方形xMnO_3陶瓷样品进行了包括Mn-55核磁共振在内的各种技术研究。SQUID磁测量、电阻率和磁阻测量。随着x的增加，样品在居里温度降低的低温下保持铁磁性，但观察到金属-绝缘体的转变。此外，在Pr(0.7)Sr(0.2)方形0.1MnO_3样品中观察到了低温下的正磁阻(MR)和高温下的负巨磁电阻(MR)。(C)2001 Elsevier Science B.V.保留所有权利。
Ceramic samples of Pr0.7Sr0.3 (x)square xMnO3 with x less than or equal to0.2 have been investigated by various techniques including Mn-55 nuclear magnetic resonance. SQUID magnetometry, resistivity and magneto resistance measurements. On increasing x, the samples remain ferromagnetic at a low temperature with a decreasing Curie temperature, but a metal-insulator transition is observed. Besides, a positive magneto resistance (MR) at very low temperatures with respect to a negative colossal MR at high temperatures is observed in the Pr(0.7)Sr(0.2)square 0.1MnO3 sample. (C) 2001 Elsevier Science B.V. All rights reserved.