Macroscopic Magnetization Control by Symmetry Breaking of Photoinduced Spin Reorientation with Intense Terahertz Magnetic Near Field

Takayuki Kurihara, Hiroshi Watanabe, Makoto Nakajima, Shutaro Karube, Kenichi Oto, Yoshi Chika Otani, Tohru Suemoto

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

We exploit an intense terahertz magnetic near field combined with femtosecond laser excitation to break the symmetry of photoinduced spin reorientation paths in ErFeO3. We succeed in aligning macroscopic magnetization reaching up to 80% of total magnetization in the sample to selectable orientations by adjusting the time delay between terahertz and optical pump pulses. The spin dynamics are well reproduced by equations of motion, including time-dependent magnetic potential. We show that the direction of the generated magnetization is determined by the transient direction of spin tilting and the magnetic field at the moment of photoexcitation.

Original languageEnglish
Article number107202
JournalPhysical review letters
Volume120
Issue number10
DOIs
Publication statusPublished - 2018 Mar 9

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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