Terahertz magnon and crystal-field transition manipulated by R3+-Fe3+ interaction in Sm0.5Pr0.5FeO3

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 175–21...

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Bibliographic Details
Published in:Applied physics letters 2018-07, Vol.113 (2)
Main Authors: Liu, Xiumei, Xie, Tao, Guo, Jiajia, Yang, Senmiao, Song, Yuna, Lin, Xian, Cao, Shixun, Cheng, Zhenxiang, Jin, Zuanming, Wu, Anhua, Ma, Guohong, Yao, Jianquan
Format: Article
Language:English
Subjects:
Anisotropy
Antiferromagnetism
Applied physics
Crystals
Electrons
Optoelectronics
Rare earth elements
Refractivity
Single crystals
Terahertz frequencies
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Summary: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.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.5037119