Avoided ferromagnetic quantum critical point in CeZn
Avoided ferromagnetic quantum critical point in CeZn
复制标题
DOI：
10.1103/physrevb.106.l180405
复制
发表时间：
2022-11
影响因子：
3.7
通讯作者：
H. Kotegawa;Toshiaki Uga;H. Tou;E. Matsuoka;H. Sugawara
中科院分区：
文献类型：
--
作者：
H. Kotegawa;Toshiaki Uga;H. Tou;E. Matsuoka;H. Sugawara
立方CeZn在压力下表现出结构相变，并且它将基态从反铁磁（AFM）态修改为铁磁（FM）态。为了研究FM状态如何在量子相变时终止，我们测量了单晶CeZn在压力下的电阻率。FM状态的转变温度随着压力的增加而单调下降，伴随着明显的近藤效应，但是在有序相终止之前，场响应发生了剧烈的变化。这一结果表明，FM量子临界点是避免了AFM类状态的出现。
Cubic CeZn shows a structural phase transition under pressure, and it modifies the ground state from an antiferromagnetic (AFM) state to a ferromagnetic (FM) state. To investigate how the FM state terminates at a quantum phase transition, we measured the electrical resistivity under pressure for a single crystal CeZn. The transition temperature into the FM state decreases monotonously with increasing pressure, accompanied by the pronounced Kondo effect, but a drastic change in the field response occurs before the ordered phase terminates. This result suggests that the FM quantum critical point is avoided by the appearance of an AFM-like state.