Spin reorientation transition process in single crystal NdFeO3

GaibeiJunjieJiangaBaojuanKangaJincangZhangaZhenxiangChengabGuohongMaaShixunCaoa

a

Department of Physics, Shanghai University, Shanghai 200444, China

b

Institute for Superconducting and Electronic Materials, University of Wollongong, Wollongong, New South Wales 2522, Australia

Received 27 October 2014, Revised 8 March 2015, Accepted 16 March 2015, Available online 23 March 2015.

Communicated by X.C. Shen

Abstract

The spin reorientation transition in single crystal NdFeO3 is studied using AC magnetic susceptibility, hysteresis loops, and polarized terahertz (THz) time domain spectroscopy measurements. Different frequency dependence behaviors of AC susceptibility reflect that the dynamic response of magnetization inside the spin reorientation region differs from the phase outside the transition region. The magnetization hysteresis loops at different temperatures reveal that domains formed during the spin reorientation process, which coincides with the abrupt increase of AC magnetic susceptibility during the transition. In addition, temperature dependent THz wave excitation of quasi-antiferromagnetic mode indicates the process of spin reorientation as a continuous rotation of Fe3+ spins rather than a mixed phase of Γ4and Γ2.

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