Observation of a metamagnetic transition in the 5f heavy-fermion compound UNi2Al3: Magnetization studies up to 90 T for single-crystalline U(Pd1-xNix)2Al3
Observation of a metamagnetic transition in the 5f heavy-fermion compound UNi2Al3: Magnetization studies up to 90 T for single-crystalline U(Pd1-xNix)2Al3
复制标题
观察 5f 重费米子化合物 UNi2Al3 中的变磁转变：单晶 U(Pd1-xNix)2Al3 高达 90 T 的磁化研究
DOI：
10.1103/physrevb.100.165137
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发表时间：
2019
影响因子：
3.7
通讯作者：
Kindo Koichi
中科院分区：
文献类型：
--
作者：
Mochidzuki Kenji;Shimizu Yusei;Kondo Akihiro;Matsuo Akira;Li Dexin;Aoki Dai;Homma Yoshiya;Honda Fuminori;Flouquet Jacques;Nakamura Daisuke;Takeyama Shojiro;Kindo Koichi
本文报道用单晶样品在78 T和30 T（42 T）下观测到的电子重费米子反铁磁体（）的变磁性。（和0.75）的磁化曲线显示在变磁转变（MMT）场急剧增加，强烈表明它们的一阶性质。所得到的相图表明可能存在三临界点，而MMT仍然发生在高温下从顺磁到极化顺磁状态作为交叉。结果表明，反铁磁有序与蒙脱土的结构密切相关，但反铁磁有序矩的自旋翻转不能解释其变磁行为。我们的实验数据揭示了磁化率的经验线性关系和标度行为，其中是磁化率最大值的温度[]。重要的是，在MMT的磁极化的临界值是大致不变的，虽然磁化率的值显着抑制随着增加。
We report an observation of metamagnetism in the-electron heavy-fermion antiferromagnetsat 78 T andat 30 T (42 T) for() using single-crystalline samples. The magnetization curves for(and 0.75) show a sharp increase at the metamagnetic transition (MMT) field, strongly indicating their first-order nature. The obtainedphase diagram forsuggests the possible presence of the tricritical point, while the MMT still occurs at high temperatures abovefrom paramagnetic to polarized-paramagnetic states as a crossover. The results indicate that the antiferromagnetic order is closely connected to the MMT in, but the metamagnetic behavior cannot be explained by the conventional spin flip of antiferromagnetic ordered moments. Our data forhave revealed an empirical linear relation ofand a scaling behavior in magnetic susceptibility of, whereis the temperature of the susceptibility maximum []. Importantly, the critical value of the magnetic polarization at the MMTis roughly unchanged, although the value of susceptibility is notably suppressed with increasing.