Localized5fantiferromagnetism in cubicUIn3:I115n-NMR/NQRstudy
Localized5fantiferromagnetism in cubicUIn3:I115n-NMR/NQRstudy
复制标题
立方UIn3中的局域化5反铁磁性：I115n-NMR/NQR研究
DOI：
10.1103/physrevb.79.104426
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发表时间：
2009
影响因子：
3.7
通讯作者：
H. Yasuoka
中科院分区：
文献类型：
--
作者：
H. Sakai;S. Kambe;Y. Tokunaga;H. Chudo;Y. Tokiwa;D. Aoki;Y. Haga;Y. Ōnuki;H. Yasuoka
对一种具有反铁磁结构的反铁磁体进行了核磁共振（NMR）和核四极共振（NQR）测量。本文从外加磁场下的核磁共振实验中估算了顺磁态的NQR频率和Knight频移。从静态磁化率的标度行为出发，导出了转移超精细耦合常数的垂直分量。在零场下，NQR谱的观测结果表明，在90K时，NQR谱的频率估计为11.8MHz. NQR弛豫速率的温度变化远高于Néel温度，接近于一个定值，这表明该系统中的电子具有定域性。另一方面，在反铁磁有序状态在4 K（远低于），核磁共振谱已被扫描的频率范围从零外加磁场。通过对NMR谱的分析，我们提出反铁磁U矩最可能的方向可能是，，或。
nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) measurements have been performed on an antiferromagnetwith the cubic-type structure. The NQR frequencyand Knight shiftofinhave been estimated in the paramagnetic state from NMR experiments under applied field. The perpendicular component of transferred hyperfine coupling constanthas been deduced from scaled behavior ofto the static susceptibility. Under zero field, the observation of the NQR spectrum has led to an estimatedof 11.8 MHz at 90 K. The temperature variation in the NQR relaxation ratesfar above the Néel temperatureapproaches a constant value, which indicates a localized nature for theelectrons in this system. On the other hand, in the antiferromagnetically ordered state at 4 K (well below), the-NMR spectrum has been scanned over frequencies ranging fromtounder zero applied field. From the analysis of the NMR spectrum, we propose that the most plausible direction of antiferromagnetic U moments may beamong the possible orientations of,, or.