...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Physical review >Thickness-dependent cooperative aging in polycrystalline films of antiferromagnet CoO
【24h】

Thickness-dependent cooperative aging in polycrystalline films of antiferromagnet CoO

机译：反铁磁CoO多晶膜中厚度依赖的协同时效

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We demonstrate that thin polycrystalline films of antiferromagnet CoO, in bilayers with ferromagnetic Permalloy, exhibit slow power-law aging of their magnetization state. The aging characteristics are remarkably similar to those previously observed in thin epitaxial Fe_(50)Mn_(50) films, indicating that these behaviors are likely generic to ferromagnet/antiferromagnet bilayers. In very thin films, aging is observed over a wide temperature range. In thicker CoO, aging effects become reduced at low temperatures. Aging entirely disappears for large CoO thicknesses. We also investigate the dependence of aging characteristics on temperature and magnetic history. Analysis shows that the observed behaviors are inconsistent with the Neel-Arrhenius model of thermal activation, and are instead indicative of cooperative aging of the antiferromagnet. Our results provide new insights into the mechanisms controlling the stationary states and dynamics of ferromagnet/antiferromagnet bilayers, and potentially other frustrated magnetic systems.
机译：我们证明了反铁磁体CoO的多晶薄膜与铁磁坡莫合金的双层表现出其磁化状态的慢幂律老化。时效特性与先前在外延Fe_（50）Mn_（50）薄膜中观察到的特性非常相似，表明这些行为很可能是铁磁体/反铁磁体双层所共有的。在非常薄的薄膜中，在很宽的温度范围内都会观察到老化。在较厚的CoO中，低温下的老化效果会降低。对于较大的CoO厚度，老化会完全消失。我们还研究了老化特性对温度和磁历史的依赖性。分析表明，观察到的行为与热激活的Neel-Arrhenius模型不一致，而是指示反铁磁体的协同老化。我们的结果为控制铁磁/反铁磁双层以及其他可能受挫的磁性系统的稳态和动力学机制提供了新见解。

著录项

  • 来源
    《Physical review》 |2016年第2期|024422.1-024422.10|共10页
  • 作者

    Tianyu Ma; Xiang Cheng; Stefan Boettcher; Sergei Urazhdin; Lydia Novozhilova;

  • 作者单位

    Department of Physics, Emory University, Atlanta, Georgia 30322, USA;

    Department of Physics, Emory University, Atlanta, Georgia 30322, USA;

    Department of Physics, Emory University, Atlanta, Georgia 30322, USA;

    Department of Physics, Emory University, Atlanta, Georgia 30322, USA;

    Department of Mathematics, Connecticut State University, Danbury, Connecticut 06810, USA;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号