Friday, May 15, 2015

Abstract-Terahertz Nonlinear Magnetic Response in in Antiferromagnets

Koichiro Tanaka, Y Mukai, H Hirori, T Yamamoto, and H Kageyama

We report on the nonlinear magnetization dynamics of a HoFeO3 crystal induced by a strong terahertz magnetic field resonantly enhanced with a split ring resonator. The terahertz magnetic field induces a large magnetization change of 40% of the spontaneous magnetization. The frequency of the antiferromagnetic resonance decreases in proportion to the square of the magnetization change.
© 2015 OSA
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