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Sr掺杂Eu_（1-x）Sr_xMnO_3体系的磁相变以及输运特性研究
  • ISSN号：1000-3290
  • 期刊名称：《物理学报》
  • 时间：0
  • 分类：TN304.26[电子电信—物理电子学]
  • 作者机构：[1]上海大学理学院物理系,上海200444
  • 相关基金：国家自然科学基金（批准号：50932003 10674092 10774097）; 高等学校博士学科点专项科研基金（批准号：20093108120006）; 上海市教育委员会科技创新基金重点项目（批准号：09ZZ95）; 上海市科学技术委员会（批准号：08DJ1400202 10ZR1411000）资助的课题~~
作者： 张佳佳[1], 曹世勋[1], 袁淑娟[1], 李哲[1], 康保娟[1], 张金仓[1]
关键词： Eu1-xSrxMnO3体系, Sr掺杂, 可变程跳跃模型, Eu1 -xSrxMnO3 system, Sr-doped, variable range hopping
中文摘要：

对Eu1-xSrxMnO3（ESMO,x=0—1）体系的结构和磁性进行了系统的研究,结果表明Sr的掺入使EuMnO3反铁磁母体的磁结构发生巨大的变化.通过磁化和电输运测量,深入探讨了高掺杂浓度Eu0.4Sr0.6MnO3和Eu0.3Sr0.7MnO3样品反常的磁相变和电输运行为.分析认为,这种反常的磁相变主要起源于样品中铁磁与反铁磁之间的竞争.同时,基于理论模拟,两样品在低温区域的导电行为基本符合可变程跳跃（VRH）模型.

英文摘要：

The structure and magnetic properties of the Eu1-x SrxMnO3 （ESMO x = 0—1） system have been systematically studied. The results indicate that the substitution of Sr for Eu can greatly change the magnetic properties of antiferromagnetic EuMnO3 matrix. In the case of high doping compounds （Eu0.4 Sr0.6 MnO3 and Eu0.3 Sr0.7 MnO3）,the abnormal magnetic and electrical properties result from the competition between their being ferromagnetic and antiferromagnetic. At low temperature,the conducting behavior of the Eu0.4 Sr0.6 MnO3 and Eu0.3 Sr0.7 MnO3 are well fitted by the Mott variable range hopping （VRH） model.

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期刊信息
  • 《物理学报》
  • 北大核心期刊（2011版）
  • 主管单位:中国科学院
  • 主办单位:中国物理学会 中国科学院物理研究所
  • 主编：欧阳钟灿
  • 地址：北京603信箱(中国科学院物理研究所)
  • 邮编：100190
  • 邮箱：apsoffice@iphy.ac.cn
  • 电话：010-82649026
  • 国际标准刊号：ISSN：1000-3290
  • 国内统一刊号：ISSN：11-1958/O4
  • 邮发代号:2-425
  • 获奖情况:
  • 1999年首届国家期刊奖,2000年中科院优秀期刊特等奖,2001年科技期刊最高方阵队双高期刊居中国期刊第12位
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  • 被引量:49876