Photoinduced transient states of antiferromagnetic orderings in La1/3Sr2/3FeO3 and SrFeO3−δ thin films observed through time-resolved resonant soft x-ray scattering

The relationship between the magnetic interaction and photoinduced dynamics in antiferromagnetic perovskites is investigated in this study. In La1/3Sr2/3FeO3 thin films, commensurate spin ordering is accompanied by charge disproportionation, whereas SrFeO3−δ thin films show incommensurate helical an...

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Bibliographic Details
Published in:New journal of physics 2022-04, Vol.24 (4), p.043012
Main Authors: Yamamoto, Kohei, Tsuyama, Tomoyuki, Ito, Suguru, Takubo, Kou, Matsuda, Iwao, Pontius, Niko, Schüßler-Langeheine, Christian, Minohara, Makoto, Kumigashira, Hiroshi, Yamasaki, Yuichi, Nakao, Hironori, Murakami, Youichi, Katase, Takayoshi, Kamiya, Toshio, Wadati, Hiroki
Format: Article
Language:English
Subjects:
antiferromagnetic ordering
Antiferromagnetism
Charge transfer
Coupling
Disproportionation
Ferromagnetic materials
Magnetism
Perovskites
Physics
Soft x rays
Spin dynamics
synchrotron radiation
Thin films
time-resolved resonant soft x-ray scattering
X-ray scattering
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Summary:The relationship between the magnetic interaction and photoinduced dynamics in antiferromagnetic perovskites is investigated in this study. In La1/3Sr2/3FeO3 thin films, commensurate spin ordering is accompanied by charge disproportionation, whereas SrFeO3−δ thin films show incommensurate helical antiferromagnetic spin ordering due to increased ferromagnetic coupling compared to La1/3Sr2/3FeO3. To understand the photoinduced spin dynamics in these materials, we investigate the spin ordering through time-resolved resonant soft x-ray scattering. In La1/3Sr2/3FeO3, ultrafast quenching of the magnetic ordering within 130 fs through a nonthermal process is observed, triggered by charge transfer between the Fe atoms. We compare this to the photoinduced dynamics of the helical magnetic ordering of SrFeO3−δ. We find that the change in the magnetic coupling through optically induced charge transfer can offer an even more efficient channel for spin-order manipulation.
ISSN:1367-2630
DOI:10.1088/1367-2630/ac5f31