Terahertz magnetic field induced coherent spin precession in YFeO3

被引：64

作者：

Zhou, Runze ^{[1
]}

Jin, Zuanming ^{[1
]}

Li, Gaofang ^{[1
]}

Ma, Guohong ^{[1
]}

Cheng, Zhenxiang ^{[2
]}

Wang, Xiaolin ^{[2
]}

机构：

[1] Shanghai Univ, Dept Phys, Shanghai 200444, Peoples R China

[2] Univ Wollongong, Inst Superconductor & Elect Mat, Fac Engn, N Wollongong, NSW 2500, Australia

来源：

APPLIED PHYSICS LETTERS | 2012年 / 100卷 / 06期

基金：

中国国家自然科学基金; 澳大利亚研究理事会;

关键词：

Iron compounds - Yttrium oxide - Electromagnetic pulse - Magnetization;

D O I：

10.1063/1.3682082

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present the magnetic dipole transition at 0.299 THz excited by magnetic component of terahertz electromagnetic pulse in an antiferromagnetic YFeO3 crystal. The impulsive magnetic field of the terahertz pulse tilts the macroscopic magnetization, causing deviation from the equilibrium position, which is manifested by a sharp absorption at the frequency of the quasiferromagnetic mode of the crystal. The rotating coherent macroscopic magnetization radiates elliptically polarized emission at the frequency of the quasiferromagnetic resonance due to the dichroic absorption in the crystal. (C) 2012 American Institute of Physics. [doi:10.1063/1.3682082]

引用

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