Cu-NQR of CeCu2Si2 under high pressure
Cu-NQR of CeCu2Si2 under high pressure
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高压下 CeCu2Si2 的 Cu-NQR
DOI：
10.1088/1742-6596/391/1/012012
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
F. Steglich
中科院分区：
文献类型：
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作者：
K. Fujiwara;M. Iwata;Y. Okazaki;Y. Ikeda;S. Araki;T. Kobayashi;K. Murata;C. Geibel;F. Steglich
我们测量了~（63）Cu-NQR谱线和在5.4GPa压力下的核自旋-晶格弛豫时间T_1。采用7474瑞香油作为传压介质，以获得良好的流体静力性。在4GPa以上，NQR频率63νq在低压区（P ≤ 3.5GPa）从线性压力依赖性突然下降。观察到的63νq的突然向下偏移与Ce价态的增加有关。在4.5 GPa以上，再次观察到63νq的线性压力依赖性，很可能与高价态的急剧交叉有关。
We have measured 63Cu-NQR spectral lines and nuclear spin-lattice relaxation time T1 under pressure up to 5.4 GPa. Daphne oil 7474 is used as the pressure-transmitting medium to obtain good hydrostaticity. NQR frequency 63νq above 4 GPa suddenly decreases from the linear pressure dependence in the low pressure range (P ≤ 3.5 GPa). The observed sudden downward deviation of 63νq is associated with an increase of Ce valence. Above 4.5 GPa, the linear pressure dependence of 63νq is observed again, most likely related to the sharp crossover to the high valence state.