...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Physical review >Experimental observation of magnetic dimers in diluted Yb: YAlO_3
【24h】

Experimental observation of magnetic dimers in diluted Yb: YAlO_3

机译：稀释Yb中磁二聚体的实验观察：YALO_3

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 present a comprehensive experimental investigation of Yb magnetic dimers in Yb_(0.04)Y_(0.96)AlO_3, an Yb-doped yttrium aluminum perovskite YAlO_3, by means of specific heat, magnetization, and high-resolution inelastic neutron scattering (INS) measurements. In our sample, the Yb ions are randomly distributed over the lattice and ～7% of Yb ions form quantum dimers due to nearest-neighbor antiferromagnetic coupling along the c axis. At zero field, the dimer formation manifests itself in an appearance of an inelastic peak at Δ ≈ 0.2 meV in the INS spectrum and a Schotlky-like anomaly in the specific heat. The structure factor of the INS peak exhibits a cosine modulation along the L direction, in agreement with the r-axis nearest-neighbor intradimer coupling. A careful fitting of the low-temperature specific heat shows that the excited state is a degenerate triplet, which indicates a surprisingly small anisotropy of the effective Yb-Yb exchange interaction despite the low crystal symmetry and anisotropic magnetic dipole contribution, in agreement with previous reports for the Yb parent compound, YbAlO_3 [L. Wu et al., Nat. Commun. 10, 698 (2019), L. S. Wu et al., Phys. Rev. B 99, 195117 (2019)], and in contrast to Yb_2Pt_2Pb [L. S. Wu et al., Science 352, 1206 (2016), W. J. Gannon et al., Nat. Commun. 10, 1123 (2019)]. The obtained results are precisely reproduced by analytical calculations for the Yb dimers.
机译：我们通过特定的热，磁化和高分辨率无弹性中子散射（INS）测量，在YB_（0.04）Y_（0.04）Y_（0.96）ALO_3，YB掺杂的钇铝钙钛矿YALO_3中的综合实验研究。在我们的样品中，Yb离子随机分布在晶格上，并且由于沿C轴的最近邻近的反铁磁耦合而形成量子二聚体的〜7％。在零场处，二聚体形成在Ins谱的δ≈0.2meV的内部峰的外观中表现出在特定热量中的β020mV的外观。 INS峰的结构因子沿L方向显示余弦调制，同时与R轴最近的邻邻进的电压器联接器一致。仔细拟合低温特异性的热量表明，激发态是简并的三态，这表明尽管晶体对称性和各向异性磁性偶极贡献低，但与先前的报告相一致表明有效的YB-YB交换相互作用的令人惊讶的小各向异性对于Yb母体化合物，YBALO_3 [L. Wu等人。，NAT。安排。 10,698（2019），L.S.Wu等，Phy。 Rev. B 99,195117（2019）]，与YB_2PT_2PB相反[L. S. Wu等人。，Science 352,1206（2016），W.J.Gannon等，NAT。安排。 10,1123（2019）]。通过对Yb二聚体的分析计算精确地再现所得结果。

著录项

  • 来源
    《Physical review》 |2020年第24期|245150.1-245150.8|共8页
  • 作者

    S. E. Nikitin; Tao Xie; A. Podlesnyak; I. A. Zaliznyak;

  • 作者单位

    Max Planck Institute for Chemical Physics of Solids D-01187 Dresden Germany Institut fuer Festkoerper- und Materialphysik Technische Universitaet Dresden D-01069 Dresden Germany;

    Neutron Scattering Division Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA;

    Neutron Scattering Division Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA;

    Condensed Matter Physics and Materials Science Division Brookhaven National Laboratory Upton New York 11973 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