Low Curie temperature ferromagnetic phase in SmPt2Cd20 possibly accompanied by strong quantum fluctuations
Low Curie temperature ferromagnetic phase in SmPt2Cd20 possibly accompanied by strong quantum fluctuations
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SmPt2Cd20 中的低居里温度铁磁相可能伴有强量子涨落
DOI：
10.1103/physrevb.96.085102
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发表时间：
2017
影响因子：
3.7
通讯作者：
Aoki Yuji
中科院分区：
文献类型：
--
作者：
Yamada Akira;Oike Shota;Higashinaka Ryuji;Matsuda Tatsuma D.;Aoki Yuji
测量了单晶的电阻率、磁化率和比热。在立方化合物中，它在k上表现出最低的铁磁跃迁。比热除以温度随温度降低而增加，即使低于温度也达到4.5 j0.26 K，这意味着存在大量的磁量子涨落。磁熵分析表明，具有双基态和四重激发态（激发能）的Smmultiplet存在晶体-电场分裂。电阻率在2 K以下呈幂律规律，在2 K以下无明显异常。视为位于FM量子临界点附近的稀有立方系统。
Electrical resistivity, magnetization, and specific heat have been measured for single crystals of. It has been found thatexhibits a ferromagnetic (FM) transition atK, the lowest among cubic compounds. Specific heat divided by temperature increases with decreasing temperature even belowand attains 4.5 Jat 0.26 K, implying substantial magnetic quantum fluctuations. An analysis of the magnetic entropy suggests the crystalline-electric-field splitting of the Smmultiplet with adoublet ground state and aquartet excited state (the excitation energy of). The electrical resistivity shows a power-law behavior withbelow 2 K without showing any noticeable anomaly at.is regarded as a rare cubic system that is located in the vicinity of a FM quantum critical point.