High-Field Multi-Frequency ESR in the Rare-Earth Spinel Compound CdYb2S4
High-Field Multi-Frequency ESR in the Rare-Earth Spinel Compound CdYb2S4
复制标题
稀土尖晶石化合物 CdYb2S4 的高场多频 ESR
DOI：
10.1007/s00723-015-0651-x
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
T. Takeuchi and M. Hagiwara
中科院分区：
文献类型：
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作者：
D. Yoshizawa;T. Kida;S. Nakatsuji;K. Iritani;M. Halim;T. Takeuchi and M. Hagiwara
我们用电子自旋共振(ESR)方法测量了CdYb2S4多晶样品的低温磁序态。这种材料是一种稀土尖晶石化合物，其中Yb3+离子形成焦绿石晶格，因此，由于几何受挫和各向异性项，CdYb2S4具有反常性质。一些ESR信号已经被探测到，并且它们的共振场在频率-磁场平面上被线性直线很好地拟合。其中一个ESR模式似乎与这个平面的原点相交，这表明这种材料的磁有序状态下几乎没有缝隙的特征。在Hc=22.6T以上出现两个额外的ESR模，表明在Hc处存在场致相变。考虑到Cd Yb_2S_4的近乎无间隙的特性，我们预计它的基态一定是Palmer-Chalker态或ψ_2态。
We have performed electron spin resonance (ESR) measurements in the low temperature magnetic-ordered state of polycrystalline samples of CdYb2S4. This material is one of the rare-earth spinel compounds in which Yb3+ions form the pyrochlore lattice, and consequently, CdYb2S4possesses anomalous properties caused by geometrical frustration and anisotropic terms. Some ESR signals have been detected, and their resonance fields are well-fitted by linear lines in the frequency vs. magnetic-field plane. One of the ESR modes appears to intersect the origin of this plane, suggesting a nearly gapless feature in the magnetically ordered state of this material. Two additional ESR modes appear aboveHc= 2.6 T, indicating that there is a field-induced phase transition atHc. Given the nearly gapless feature of CdYb2S4, we expect that the ground state of CdYb2S4must be either the Palmer–Chalker state or theψ2state.