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Ca和Ba掺杂对La（4／3）Sr（5／3）Mn2O7的磁电阻效应的影响
  • ISSN号：1671-4512
  • 期刊名称：《华中科技大学学报：自然科学版》
  • 时间：0
  • 分类：O482.5[理学—固体物理;理学—物理] 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]广东技术师范学院电子与信息学院,广东广州510665, [2]洪湖市第二中学,湖北洪湖433203
  • 相关基金：国家自然科学基金项目（10574049）.
作者： 刘莉[1], 王永强[1], 余功奇[1], 袁松柳[1]
关键词： La0.67Ca0.33MnO3/MgO, 磁化强度, 藕合
中文摘要：

用溶胶凝胶自蔓延燃烧法和水浴包覆法制备了（1-x）La0．67Ca0．33MnO3（LCMO）／xMgO复合体系，系统研究了该体系的结构、电输运和磁化行为。在磁化强度随温度降低的变化关系中，观察到2个磁转变。对不同MgO含量的复合样品，观察到的第1个磁转变温度都相同，和纯LCMO的居里温度Tr相对应；观察到的第2个磁转变温度和测得的阻温关系中的Tp对应，随MgO含量的增加向低温移动。最后运用铁磁颗粒系统中颗粒之间的磁藕合关系对实验结果进行了讨论。

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期刊信息
  • 《华中科技大学学报：自然科学版》
  • 中国科技核心期刊
  • 主管单位:中华人民共和国教育部
  • 主办单位:华中科技大学
  • 主编：丁烈云
  • 地址：武汉珞喻路1037号
  • 邮编：430074
  • 邮箱：hgxbs@mail.hust.edu.cn
  • 电话：027-87543916 87544294
  • 国际标准刊号：ISSN：1671-4512
  • 国内统一刊号：ISSN：42-1658/N
  • 邮发代号:38-9
  • 获奖情况:
  • 全国优秀科技期刊,首届国家期刊奖,第二届全国优秀科技期刊评比一等奖,中国期刊方阵“双效”期刊
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  • 被引量:21013