High-Field Multi-Frequency ESR in the Quasi-1D S = 1/2 Ising-Like Antiferromagnet BaCo2V2O8 in a Transverse Field
High-Field Multi-Frequency ESR in the Quasi-1D S = 1/2 Ising-Like Antiferromagnet BaCo2V2O8 in a Transverse Field
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DOI：
10.1007/s00723-015-0655-6
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发表时间：
2015-03
影响因子：
1
通讯作者：
A. Okutani;S. Kimura;T. Takeuchi;M. Hagiwara
中科院分区：
文献类型：
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作者：
A. Okutani;S. Kimura;T. Takeuchi;M. Hagiwara
我们在1.5 K下，在沿[110]和[100]方向施加高达14 T的磁场下，对th1 /2准一维（1D）类伊辛反铁磁体baco2v2o8单晶进行了高场多频电子自旋共振（ESR）测量。两种情况下，在400 GHz处均观察到两个主要ESR支路随磁场的增加而上升和下降。低ESR模式在h ||的10 T附近有软化[100]，而在h ||的14 T以下没有软化[110]。磁激励的这种差异可以解释这两个方向的相图的不同。
We have performed high-field multi-frequency electron spin resonance (ESR) measurements of a single crystal of theS= 1/2 quasi one-dimensional (1D) Ising-like antiferromagnet BaCo2V2O8at 1.5 K in magnetic fields of up to 14 T applied along [110] and [100] directions. Two main ESR branches, which are ascending and descending with increasing magnetic fields, are observed from 400 GHz at zero magnetic field in both cases. The low ESR mode shows a softening near 10 T forH|| [100], while no softening was observed below 14 T forH|| [110]. This difference in the magnetic excitations may explain the distinct phase diagrams for these two directions.