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Reconfiguration of magnetic domain structures of ErFeO3 by intense terahertz free electron laser pulses.
Kurihara, Takayuki; Hirota, Kazumasa; Qiu, Hongsong; Phan, Khoa Thanh Nhat; Kato, Kosaku; Isoyama, Goro; Nakajima, Makoto.
Affiliation
  • Kurihara T; Center for Applied Photonics, University of Konstanz, Universitatsstraße 10, Konstanz, Germany. takayuki.kurihara@issp.u-tokyo.ac.jp.
  • Hirota K; Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka, Japan. takayuki.kurihara@issp.u-tokyo.ac.jp.
  • Qiu H; Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka, Japan.
  • Phan KTN; Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka, Japan.
  • Kato K; Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka, Japan.
  • Isoyama G; Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka, Japan.
  • Nakajima M; Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka, Japan, Osaka, Japan.
Sci Rep ; 10(1): 7321, 2020 Apr 30.
Article in En | MEDLINE | ID: mdl-32355246
ABSTRACT
Understanding the interaction between intense terahertz (THz) electromagnetic fields and spin systems has been gaining importance in modern spintronics research as a unique pathway to realize ultrafast macroscopic magnetization control. In this work, we used intense THz pulses with pulse energies in the order of 10 mJ/pulse generated from the terahertz free electron laser (THz-FEL) to irradiate the ferromagnetic domains of ErFeO3 single crystal. It was found that the domain shape can be locally reconfigured by irradiating the THz - FEL pulses near the domain boundary. Observed domain reconfiguration mechanism can be phenomenologically understood by the combination of depinning effect and the entropic force due to local thermal gradient exerted by terahertz irradiation. Our finding opens up a new possibility of realizing thermal-spin effects at THz frequency ranges by using THz-FEL pulses.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Type of study: Qualitative_research Language: En Journal: Sci Rep Year: 2020 Type: Article Affiliation country: Germany
Fulltext
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PubMed Links
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Full text: 1 Collection: 01-internacional Database: MEDLINE Type of study: Qualitative_research Language: En Journal: Sci Rep Year: 2020 Type: Article Affiliation country: Germany