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Terahertz magnon and crystal-field transition manipulated by R3+-Fe3+ interaction in Sm0.5Pr0.5FeO3
Applied Physics Letters ( IF 4 ) Pub Date : 2018-07-09 , DOI: 10.1063/1.5037119
Xiumei Liu 1 , Tao Xie 2 , Jiajia Guo 1 , Senmiao Yang 1 , Yuna Song 1 , Xian Lin 1 , Shixun Cao 1 , Zhenxiang Cheng 1, 3 , Zuanming Jin 1 , Anhua Wu 2 , Guohong Ma 1 , Jianquan Yao 4
Affiliation  

We use terahertz (THz) magnetic and electric fields to investigate the magnetic and optoelectronic responses of the Sm0.5Pr0.5FeO3 (SPFO) crystal, respectively, by THz time-domain spectroscopy. It is found that the spin reorientation transition (SRT) in SPFO occurs in the temperature range of 175–210 K. The SRT is not observed in PrFeO3. The quasi-antiferromagnetic magnon frequency has a blue-shift from 0.42 THz (PrFeO3) to 0.46 THz (SPFO) at room temperature, due to the enhanced anisotropy constant. The refractive index of SPFO in the THz frequency decreases around 3% compared with that of the PrFeO3 crystal. In addition, it can be found that the energy scale of crystal-field transitions has a red-shift for the doped single crystal. We expect our results to make rare-earth orthoferrites accessible to potential applications in THz spintronic devices.We use terahertz (THz) magnetic and electric fields to investigate the magnetic and optoelectronic responses of the Sm0.5Pr0.5FeO3 (SPFO) crystal, respectively, by THz time-domain spectroscopy. It is found that the spin reorientation transition (SRT) in SPFO occurs in the temperature range of 175–210 K. The SRT is not observed in PrFeO3. The quasi-antiferromagnetic magnon frequency has a blue-shift from 0.42 THz (PrFeO3) to 0.46 THz (SPFO) at room temperature, due to the enhanced anisotropy constant. The refractive index of SPFO in the THz frequency decreases around 3% compared with that of the PrFeO3 crystal. In addition, it can be found that the energy scale of crystal-field transitions has a red-shift for the doped single crystal. We expect our results to make rare-earth orthoferrites accessible to potential applications in THz spintronic devices.

中文翻译:

Sm0.5Pr0.5FeO3 中由 R3+-Fe3+ 相互作用控制的太赫兹磁振子和晶体场跃迁

我们使用太赫兹 (THz) 磁场和电场通过太赫兹时域光谱分别研究 Sm0.5Pr0.5FeO3 (SPFO) 晶体的磁和光电响应。发现 SPFO 中的自旋重定向转变 (SRT) 发生在 175-210 K 的温度范围内。在 PrFeO3 中未观察到 SRT。由于增强的各向异性常数,准反铁磁磁振子频率在室温下从 0.42 THz (PrFeO3) 蓝移到 0.46 THz (SPFO)。SPFO 在太赫兹频率下的折射率与 PrFeO3 晶体相比降低了约 3%。此外,可以发现掺杂单晶的晶场跃迁的能级有红移。我们希望我们的结果使稀土正铁氧体在太赫兹自旋电子器件中具有潜在的应用价值。我们使用太赫兹 (THz) 磁场和电场分别研究 Sm0.5Pr0.5FeO3 (SPFO) 晶体的磁和光电响应,通过太赫兹时域光谱。发现 SPFO 中的自旋重定向转变 (SRT) 发生在 175-210 K 的温度范围内。在 PrFeO3 中未观察到 SRT。由于增强的各向异性常数,准反铁磁磁振子频率在室温下从 0.42 THz (PrFeO3) 蓝移到 0.46 THz (SPFO)。SPFO 在太赫兹频率下的折射率与 PrFeO3 晶体相比降低了约 3%。此外,可以发现,掺杂单晶的晶场跃迁能级有红移。我们希望我们的结果使稀土正铁氧体可用于太赫兹自旋电子器件的潜在应用。
更新日期:2018-07-09
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