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（1-x）La2／3Ca1／3MnO3／xSb2O5复合体系的电子输运和磁电阻行为
  • ISSN号：1000-324X
  • 期刊名称：《无机材料学报》
  • 时间：0
  • 分类：TM271[电气工程—电工理论与新技术;一般工业技术—材料科学与工程]
  • 作者机构：[1]华中科技大学物理系,武汉430074
  • 相关基金：国家自然科学基金（10574049）
作者： 袁力[1], 缪菊红[1], 王永强[1], 刘莉[1], 袁松柳[1]
关键词： 锰基钙钛矿氧化物, 复合, 磁电阻, 自旋极化隧道, perovskite manganites, composite, magnetoresistance, spin-polarized tunneling
中文摘要：

用两步法制备了（1-x）La2／3Ca1／3MnO3／xSb2O5复合样品．零场下电阻温度关系测量表明，对x〈3％范围。随Sb2O5含量增加，复合样品电阻率增大，绝缘体一金属转变温度降低；而对x〉3％范围，随Sb2O5含量增加。复合样品电阻率减小，绝缘体一金属转变温度提高．磁电阻测量表明，少量Sb2O5同La,2／3C＆1／3MnO3复合，可明显增强磁电阻效应．

英文摘要：

The composites with the nominal composition of （1 - x）La2/3Cal/3MnO3/xSb2O5 were fa ricated. The study of temperature dependence of resistivity at zero field shows that the metal-insulator transition temperature （Tp） and the resistivity of the composites are dependent on Sb2O5 addition level x. When x 〈3%, Tp shifts towards low temperature and resistivity increases with the increase of x. But Tp shifts towards high temperature and resistivity decreases with further increasing of x. The measurement for temperature dependence of magnetoresistance （MR） indicates that MR effect can be largely enhanced in the composites with small Sb2O5 addition.

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期刊信息
  • 《无机材料学报》
  • 北大核心期刊（2011版）
  • 主管单位:中国科学院
  • 主办单位:中国科学院上海硅酸盐所
  • 主编：郭景坤
  • 地址：上海市定西路1295号
  • 邮编：200050
  • 邮箱：wjclxb@mail.sic.ac.cn
  • 电话：021-52411302
  • 国际标准刊号：ISSN：1000-324X
  • 国内统一刊号：ISSN：31-1363/TQ
  • 邮发代号:4-504
  • 获奖情况:
  • 获"中国百种杰出学术期刊"称号
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  • 被引量:21274