Quadrupolar susceptibility and magnetic phase diagram of PrNi 2 Cd 20 with non-Kramers doublet ground state
Quadrupolar susceptibility and magnetic phase diagram of PrNi 2 Cd 20 with non-Kramers doublet ground state
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非Kramers双重态基态PrNi 2 Cd 20 的四极磁化率和磁相图
DOI：
10.1080/14786435.2019.1709912
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发表时间：
2020
影响因子：
1.6
通讯作者：
White, Benjamin D.
中科院分区：
文献类型：
--
作者：
Yanagisawa, Tatsuya;Hidaka, Hiroyuki;Amitsuka, Hiroshi;Nakamura, Shintaro;Awaji, Satoshi;Green, Elizabeth L.;Zherlitsyn, Sergei;Wosnitza, Joachim;Yazici, Duygu;White, Benjamin D.
在本研究中，我们对立方PrNi2Cd20单晶进行了超声测量，温度降至0.02 K，以研究晶体电场基态，并寻找在低温下可能发生的相变。与Γ3-symmetry四极响应相关的弹性常数(C11−C12)/2在温度低于~ 30 K时表现出居里型软化，表明该体系具有Γ3non-Kramers重态基态。在接近最低温度的~ 0.1 K以下，弹性响应趋于平稳，这意味着由于与Γ3-symmetry多极子相关的有限体积分数中的长程有序而存在能级分裂。该化合物的磁场-温度相图在28t时为h ||构建[110]。通过高磁场测量还检测到一个清晰的声学de Haas-van Alphen信号和一个可能的磁场诱导相变atH ~ 26t。
In this study, ultrasonic measurements were performed on a single crystal of cubic PrNi2Cd20, down to a temperature of 0.02 K, to investigate the crystalline electric field ground state and search for possible phase transitions at low temperatures. The elastic constant (C11−C12)/2, which is related to the Γ3-symmetry quadrupolar response, exhibits the Curie-type softening at temperatures below ∼30 K, which indicates that the present system has a Γ3non-Kramers doublet ground state. A leveling-off of the elastic response appears below ∼0.1 K toward the lowest temperatures, which implies the presence of level splitting owing to a long-range order in a finite-volume fraction associated with Γ3-symmetry multipoles. A magnetic field–temperature phase diagram of the present compound is constructed up to 28 T forH|| [110]. A clear acoustic de Haas–van Alphen signal and a possible magnetic-field-induced phase transition atH∼26 T are also detected by high-magnetic-field measurements.