High-Field Optical Spectroscopy of the chromium spinel CdCr2O4
High-Field Optical Spectroscopy of the chromium spinel CdCr2O4
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铬尖晶石 CdCr2O4 的高场光谱分析
DOI：
10.1088/1742-6596/568/4/042028
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
H. Ueda
中科院分区：
文献类型：
--
作者：
Y. Sawada;S. Kimura;K. Watanabe;H. Ueda
我们已经进行了高场光学光谱测量的几何阻挫铬尖晶石氧化物CdCr 2 O 4在可见光区。通过对自旋波态密度的理论计算，我们成功地观察到了纯激子激发峰，并确定了其它一些吸收峰为激子-磁振子激发峰。此外，从高场实验中，在4 T附近观察到吸收峰的大变化。这一结果表明，一些磁相变发生在这个领域。
We have performed high-field optical spectroscopy measurements of the geometrically frustrated chromium spinel oxide CdCr 2 O 4 in the visible light region. We succeeded in observing the pure exciton excitation peak, and identified some other absorption peaks as exciton-magnon excitation peaks from the theoretical calculations of density of states of the spin wave. Furthermore, from the high-field experiment, large variations of absorption peaks were observed at around 4 T. This result indicates that some magnetic phase transition occurs around this field.