Title

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

RIS ID

129082

Publication Details

Liu, X., Xie, T., Guo, J., Yang, S., Song, Y., Lin, X., Cao, S., Cheng, Z., Jin, Z., Wu, A., Ma, G. & Yao, J. (2018). Terahertz magnon and crystal-field transition manipulated by R3+-Fe3+interaction in Sm0.5Pr0.5FeO3. Applied Physics Letters, 113 (2), 022401-1-022401-5.

Abstract

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 PrFeO3crystal. 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.

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Link to publisher version (DOI)

http://dx.doi.org/10.1063/1.5037119