...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Physical review >Magnetic-field-induced spin-flop transition in Na_xCoO_2 (0.5 < x < 0.55)
【24h】

Magnetic-field-induced spin-flop transition in Na_xCoO_2 (0.5 < x < 0.55)

机译：Na_xCoO_2中的磁场感应自旋跃迁跃迁（0.5

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

The isothermal magnetoresistance (MR) with magnetic field (H) parallel and perpendicular to the ab plane is systematically studied on the single crystal Na_(0.52)CoO_2 with charge ordering at ～50 K and an in-plane ferromagnetism below 25 K. The isothermal MR behavior with H‖ab plane and that with H ⊥ ab plane are quite different. When H‖ab plane, the MR is always negative and the in-plane ferromagnetic behavior is enhanced, while the MR with H ⊥ ab plane changes from negative to positive with decreasing temperature or increasing H, and the in-plane ferromagnetic behavior is suppressed. A striking feature is that the MR with H ⊥ ab plane shows a hysteresis behavior below 25 K, which is absent for the case of H‖ab plane. These results provide strong evidence for a spin-flop transition of small moments of Co~(3.5-δ) sites induced by H ⊥ ab plane, leading to a metamagnetic transition for small moments of Co~(3.5-δ) sites. Such complex magnetism suggests an unconventional superconductivity in Na_xCoO_2 system because the charge-ordering Na_xCoO_2 around x=0.5 has been considered to be the parent compound of superconductivity.
机译：在单晶Na_（0.52）CoO_2上，电荷顺序为〜50 K，面内铁磁性低于25 K，系统地研究了具有平行于和垂直于ab平面的磁场（H）的等温磁阻（MR）。 H′ab平面和H⊥ab平面的MR行为有很大的不同。当H′ab平面时，MR总是为负，并且平面内的铁磁行为得到增强，而H decreasing ab平面的MR随着温度的降低或H的增加而从负变为正，从而抑制了平面内的铁磁行为。 。一个显着的特征是，具有H b ab平面的MR在25 K以下显示出磁滞行为，而对于H′ab平面而言则没有。这些结果为由H⊥ab平面引起的Co〜（3.5-δ）位的小力矩的自旋跃迁跃迁提供了有力的证据，导致Co〜（3.5-δ）位的小力矩的亚磁跃迁。这种复杂的磁性表明在Na_xCoO_2系统中具有非常规的超导性，因为围绕x = 0.5的电荷排序Na_xCoO_2被认为是超导的母体化合物。

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