Ferromagnetic critical behavior in U(Co1-xFex)Al (0 < x < 0.02) studied by 59Co nuclear quadrupole resonance measurement
Ferromagnetic critical behavior in U(Co1-xFex)Al (0 < x < 0.02) studied by 59Co nuclear quadrupole resonance measurement
复制标题
通过 59Co 核四极共振测量研究 U(Co1-xFex)Al (0 < x < 0.02) 中的铁磁临界行为
DOI：
10.1103/physrevb.91.075131
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发表时间：
2015
影响因子：
3.7
通讯作者：
and N. Kimura
中科院分区：
文献类型：
--
作者：
K. Karube;T. Hattori;K. Ishida;and N. Kimura
为了研究巡回电子变磁化合物UCoAl中铁磁（FM）量子转变点和三临界点（TCP）周围的物理性质，我们对零外磁场下的Fe取代进行了核四极共振（NQR）测量。低温下光谱的 Fe 浓度依赖性表明，一阶 FM 跃迁至少发生在上面。核自旋-自旋弛豫率检测到的沿轴的磁涨落表现出异常，并随着增加而增强。这些结果与理论预测非常吻合，表明该系统中 TCP 处存在显着的临界波动。
In order to investigate physical properties around a ferromagnetic (FM) quantum transition point and a tricritical point (TCP) in the itinerant-electron metamagnetic compound UCoAl, we have performed thenuclear quadrupole resonance (NQR) measurement for the Fe-substitutedin zero external magnetic field. The Fe concentration dependence ofspectra at low temperatures indicates that the first-order FM transition occurs at least above. The magnetic fluctuations along theaxis detected by the nuclear spin-spin relaxation rateexhibit an anomaly atand enhance with increasing. These results are in good agreement with theoretical predictions and indicate the presence of prominent critical fluctuations at the TCP in this system.