Geometrical frustration versus magnetic order in the heavy-fermion antiferromagnet YbAgGe under high pressure

Physical Review B 81 巻 12 号 2010 発行
アクセス数 : 1079
ダウンロード数 : 185

今月のアクセス数 : 1
今月のダウンロード数 : 3
ファイル情報(添付)
PhysRevB_81_125129.pdf 592 KB 種類 : 全文
タイトル ( eng )
Geometrical frustration versus magnetic order in the heavy-fermion antiferromagnet YbAgGe under high pressure
作成者
Sengupta K.
Forthaus M. K.
Kubo Hirokazu
Katoh Kenichi
Abd-Elmeguid M. M.
収録物名
Physical Review B
81
12
抄録
We have investigated the effect of pressure on the magnetic and structural properties of the frustrated heavy-fermion antiferromagnet YbAgGe in an extended pressure range up to 20 GPa using electrical resistivity and x-ray diffraction, respectively. We find that with increasing pressure, the magnetic ordering temperature (Tm) first increases rapidly, passes through a maximum (Tm=5.4 K at 6.8 GPa), and then drops toward zero for p above 16 GPa, while the structure remains unchanged up to about 20 GPa. We attribute the anomalous pressure dependence of Tm to a complex interplay between the Kondo effect, Ruderman-Kittel-Kasuya-Yosida interactions and the geometrical frustration of the magnetic interactions of the Yb moments in the Kagomé-latticelike structure of YbAgGe. We further discuss the competition between geometrical frustration and long-range magnetic order together with the possible occurrence of a pressure-induced second quantum critical point in YbAgGe.
NDC分類
物理学 [ 420 ]
言語
英語
資源タイプ 学術雑誌論文
出版者
American Physical Society
発行日 2010
権利情報
Copyright (c) 2010 The American Physical Society
出版タイプ Version of Record(出版社版。早期公開を含む)
アクセス権 オープンアクセス
収録物識別子
[ISSN] 1098-0121
[DOI] 10.1103/PhysRevB.81.125129
[NCID] AA11187113
[DOI] http://dx.doi.org/10.1103/PhysRevB.81.125129