...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Physica status solidi, B. Basic research >Cooling-field dependence ofexchange bias and asymmetricreversal modes in a nanoparticlessystem with ferromagnetic core andantiferromagnetic matrix morphology
【24h】

Cooling-field dependence ofexchange bias and asymmetricreversal modes in a nanoparticlessystem with ferromagnetic core andantiferromagnetic matrix morphology

机译：具有铁磁核和反铁磁基质形态的纳米粒子系统中交换偏向和不对称反转模式的冷却场依赖性

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

Interest in exchange bias (EB) in magnetic nanoparticles hasincreased in the past few years by virtue of its potential forapplication in fields such as ultrahigh-density magnetic record-ing. A modified Monte Carlo Metropolis method is performedto simulate the effect of cooling field on EB and asymmetricreversal modes of a granular system of ferromagnetic (FM)nanoparticles embedded in an antiferromagnetic (AFM) matrix,based on three-dimensional classical Heisenberg model. Theresults show that the EB first decreases slightly due to theenergy barriers in the antiferromagnet, while the coercivity andvertical magnetization shift increase with the increase of cooling field, finally, they all level off as the cooling field isstrong enough. Whereas the cooling- and measuring-fieldangular dependence of asymmetric reversal modes revealasymmetric reversal mechanism and interesting rotationprocess of FM spins, confirming the existence of the netmagnetization on the surface of AFM matrix. The reason maybe due to the energy competition and geometric frustration ofsystem. However, the strong interfacial coupling may changethe intrinsic atomic configuration of antiferromagnet toinfluence the EB and reversal modes.
机译：磁性纳米颗粒由于其在超高密度磁性记录领域的应用潜力，近年来对交换偏压（EB）的兴趣有所增加。基于三维经典海森堡模型，执行了改进的蒙特卡洛都市法，以模拟冷却场对嵌入反铁磁（AFM）矩阵中的铁磁（FM）纳米粒子颗粒系统的EB和不对称反转模式的影响。结果表明，由于反铁磁体中的能垒，EB值先略有下降，而矫顽力和垂直磁化位移随冷却场的增加而增加，最后，由于冷却场足够强，它们均趋于平稳。不对称反转模式的冷却和测量场角依赖性揭示了FM自旋的不对称反转机理和有趣的旋转过程，这证实了AFM矩阵表面上存在磁化作用。原因可能是由于能量竞争和系统的几何受挫。但是，强界面耦合可能会改变反铁磁体的固有原子构型，从而影响EB和反转模式。

著录项

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