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

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2018

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Watanabe, Hiroshi
Nakajima, Makoto
Karube, Shutaro
Oto, Kenichi
Otani, YoshiChika
Suemoto, Tohru

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https://doi.org/10.1103/PhysRevLett.120.107202
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Physical Review Letters. 2018, 120(10), 107202. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.120.107202

Zusammenfassung

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.

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ISO 690KURIHARA, Takayuki, Hiroshi WATANABE, Makoto NAKAJIMA, Shutaro KARUBE, Kenichi OTO, YoshiChika OTANI, Tohru SUEMOTO, 2018. Macroscopic Magnetization Control by Symmetry Breaking of Photoinduced Spin Reorientation with Intense Terahertz Magnetic Near Field. In: Physical Review Letters. 2018, 120(10), 107202. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.120.107202
BibTex
@article{Kurihara2018-03-09Macro-42237,
  year={2018},
  doi={10.1103/PhysRevLett.120.107202},
  title={Macroscopic Magnetization Control by Symmetry Breaking of Photoinduced Spin Reorientation with Intense Terahertz Magnetic Near Field},
  number={10},
  volume={120},
  issn={0031-9007},
  journal={Physical Review Letters},
  author={Kurihara, Takayuki and Watanabe, Hiroshi and Nakajima, Makoto and Karube, Shutaro and Oto, Kenichi and Otani, YoshiChika and Suemoto, Tohru},
  note={Article Number: 107202}
}
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