Title :
Terahertz nonlinear magnetic response in antiferromagnets
Author :
Mukai, Y. ; Hirori, H. ; Yamamoto, T. ; Kageyama, H. ; Tanaka, K.
Author_Institution :
Dept. of Phys., Kyoto Univ., Kyoto, Japan
Abstract :
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.
Keywords :
antiferromagnetic materials; antiferromagnetic resonance; holmium compounds; magnetisation; magneto-optical effects; terahertz wave spectra; HoFeO3; antiferromagnetic resonance frequency; nonlinear magnetization dynamics; split ring resonator; spontaneous magnetization; terahertz magnetic field; terahertz nonlinear magnetic response; Crystals; Magnetic fields; Magnetic recording; Magnetic resonance; Magnetization; Optical ring resonators;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2015 Conference on
Conference_Location :
San Jose, CA
