Ultrafast Control of Magnetic Anisotropy by Resonant Excitation of 4f Electrons and Phonons in Sm0.7Er0.3FeO3

Fitzky, Gabriel; Nakajima, Makoto; Koike, Yohei; Leitenstorfer, Alfred; Kurihara, Takayuki

Ultrafast Control of Magnetic Anisotropy by Resonant Excitation of 4f Electrons and Phonons in Sm_0.7Er_0.3FeO₃

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Datum

2021

Autor:innen

Fitzky, Gabriel

Nakajima, Makoto

Koike, Yohei

Leitenstorfer, Alfred

Kurihara, Takayuki

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Physical Review Letters. American Physical Society (APS). 2021, 127(10), 107401. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.127.107401

Zusammenfassung

We compare the ultrafast dynamics of the spin reorientation transition in the orthoferrite Sm_0.7Er_0.3FeO₃ following two different pumping mechanisms. Intense few-cycle pulses in the midinfrared selectively excite either the f−f electronic transition of Sm³⁺ or optical phonons. With phonon pumping, a finite time delay exists for the spin reorientation, reflecting the energy transfer between the lattice and 4f system. In contrast, an instantaneous response is found for resonant f−f excitation. This suggests that 4f electronic pumping can directly alter the magnetic anisotropy due to the modification of 4f−3d exchange at femtosecond timescales, without involving lattice thermalization.

Fachgebiet (DDC)

530 Physik

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ISO 690

FITZKY, Gabriel, Makoto NAKAJIMA, Yohei KOIKE, Alfred LEITENSTORFER, Takayuki KURIHARA, 2021. Ultrafast Control of Magnetic Anisotropy by Resonant Excitation of 4f Electrons and Phonons in Sm_0.7Er_0.3FeO₃. In: Physical Review Letters. American Physical Society (APS). 2021, 127(10), 107401. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.127.107401

BibTex

@article{Fitzky2021Ultra-54880,
  year={2021},
  doi={10.1103/PhysRevLett.127.107401},
  title={Ultrafast Control of Magnetic Anisotropy by Resonant Excitation of 4f Electrons and Phonons in Sm<sub>0.7</sub>Er<sub>0.3</sub>FeO<sub>3</sub>},
  number={10},
  volume={127},
  issn={0031-9007},
  journal={Physical Review Letters},
  author={Fitzky, Gabriel and Nakajima, Makoto and Koike, Yohei and Leitenstorfer, Alfred and Kurihara, Takayuki},
  note={Article Number: 107401}
}

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    <dcterms:abstract xml:lang="eng">We compare the ultrafast dynamics of the spin reorientation transition in the orthoferrite Sm&lt;sub&gt;0.7&lt;/sub&gt;Er&lt;sub&gt;0.3&lt;/sub&gt;FeO&lt;sub&gt;3&lt;/sub&gt; following two different pumping mechanisms. Intense few-cycle pulses in the midinfrared selectively excite either the f−f electronic transition of Sm&lt;sup&gt;3+&lt;/sup&gt; or optical phonons. With phonon pumping, a finite time delay exists for the spin reorientation, reflecting the energy transfer between the lattice and 4f system. In contrast, an instantaneous response is found for resonant f−f excitation. This suggests that 4f electronic pumping can directly alter the magnetic anisotropy due to the modification of 4f−3d exchange at femtosecond timescales, without involving lattice thermalization.</dcterms:abstract>
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