...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Physica, B. Condensed Matter >Crystalline electric field and Kondo energy scales in YbCu5-xAgx
【24h】

Crystalline electric field and Kondo energy scales in YbCu5-xAgx

机译：YbCu5-xAgx中的晶体电场和近藤能级

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 specific heat of LuCu5-xAgx reference samples was measured to reanalyse the heavy-fermion behaviour of the isostructural AuBe5-type cubic system YbCu5-xAgx with x = 0-1 which is a series of dense Kondo compounds whose characteristic temperature T-0 decreases as x decreases. For YbCu5-xAgx, the gamma-value increases from 210 mJ/mol K-2 for x = 1.0 to 550 mJ/mol K-2 for x = 0.0. The analysis of the magnetic susceptibility and of the magnetic contribution to the specific heat in terms of Coqblin-Schrieffer (CS) model reveals a significant reduction of the effective ground state degeneracy: While YbCu4Ag is well described by the CS model with J =(1)/(2) and T-0 = 150 K, one has to consider a crystalline electric field splitting of the Yb3+ ground state multiplet with an 2 energy scale of the order of 80 K and a Kondo contribution corresponding to the CS model with J = (3)/(2) and T-0 similar to 30 K in the case of YbCu5, i.e. there is a cross-2 over of the characteristic energy scales of the Kondo interaction and of the CEF splitting within the series Yb(Cu, Ag)(5) (C) 2002 Elsevier Science B.V. All rights reserved. [References: 15]
机译：测量了LuCu5-xAgx参考样品的比热，以重新分析x = 0-1的等结构AuBe5型立方体系YbCu5-xAgx的重费米行为，这是一系列稠密的近藤化合物，其特征温度T-0降低随着x的减少。对于YbCu5-xAgx，对于x = 1.0，伽马值从210 mJ / mol K-2增加到对于x = 0.0，550 mJ / mol K-2。根据Coqblin-Schrieffer（CS）模型对磁化率和磁对比热的影响分析表明，有效基态简并性显着降低：而CS模型很好地描述了YbCu4Ag，其中J =（1 ）/（2）且T-0 = 150 K，则必须考虑Yb3 +基态多重态的晶体电场分裂，其2能级为80 K，并且Kondo贡献对应于J的CS模型。 =（3）/（2）且T-0在YbCu5的情况下类似于30 K，即在Yb（Cu ，Ag）（5）（C）2002 Elsevier Science BV保留所有权利。 [参考：15]

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