Temperature and magnetic field induced spin reorientation transition in NdFeO3 investigated with THz time-domain spectroscopy

Authors

Junjie Jiang, Shanghai University
Gaibei Song, Shanghai University
Dongyang Wang, Tianjin University
Zuanming Jin, Shanghai University
Zhen Tian, Tianjin University
Xian Lin, Shanghai University
Jiaguang Han, Tianjin University
Guohong Ma, Shanghai University
Shixun Cao, Shanghai University
Zhenxiang Cheng, University of WollongongFollow

RIS ID

100647

Publication Details

Jiang, J., Song, G., Wang, D., Jin, Z., Tian, Z., Lin, X., Han, J., Ma, G., Cao, S. & Cheng, Z. (2014). Temperature and magnetic field induced spin reorientation transition in NdFeO₃ investigated with THz time-domain spectroscopy. The 7th International Symposium on Ultrafast Phenomena and Terahertz Waves: Proceedings (pp. 45-45). United States: The Optical Society.

Abstract

THz time domain spectroscopy (TDS) with picosecond temporal resolution is employed to investigate the spin coherence in a canted antiferromagnetic RFeO₃ with R rare-earth ion. The magnetic component of incident THz pulse can be coupled effectively with the ferromagnetic (FM) and antiferromagnetic (AFM) modes of the crystal which leads to the excitation of the two kinds of modes of spin waves. In this talk, by employing TDS technique, we will focus on the dynamical spin reorientation transition in NdFeO3 crystal triggered with temperature and external magnetic field. Our studies reveal that the spin reorientation transition triggered by external magnetic field is strongly anisotropic: magnetic field along a-axis is much easier to switch the spin alignment than that along c-axis in NdFeO3 crystal. Our results demonstrated that THz spectroscopy is a sensitive way to study the spin reorientation, and which also shed light on THz switching of spin reorientation dynamics in this canted antiferromagnetic structures.