Photoinduced Transient States of Antiferromagnetic Orderings in La${}_{1/3}$Sr${}_{2/3}$FeO${}_{3}$ and SrFeO${}_{3}$ Thin Films Observed through Time-resolved Resonant Soft X-ray Scattering

Kohei Yamamoto; Tomoyuki Tsuyama; Suguru Ito; Kou Takubo; Iwao Matsuda; Niko Pontius; Christian Schüßler-Langeheine; Makoto Minohara; Hiroshi Kumigashira; Yuichi Yamasaki; Hironori Nakao; Youichi Murakami; Takayoshi Katase; Toshio Kamiya; Hiroki Wadati

doi:10.1088/1367-2630/ac5f31

arXiv · 2103.16038

Photoinduced Transient States of Antiferromagnetic Orderings in La${}_{1/3}$Sr${}_{2/3}$FeO${}_{3}$ and SrFeO${}_{3}$ Thin Films Observed through Time-resolved Resonant Soft X-ray Scattering

Kohei Yamamoto·Tomoyuki Tsuyama·Suguru Ito·Kou Takubo·Iwao Matsuda·Niko Pontius·Christian Schüßler-Langeheine·Makoto Minohara·Hiroshi Kumigashira·Yuichi Yamasaki·Hironori Nakao·Youichi Murakami·Takayoshi Katase·Toshio Kamiya·Hiroki Wadati

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Abstract

The relationship between the magnetic interaction and photoinduced dynamics in antiferromagnetic perovskites is investigated in this study. In La${}_{1/3}$Sr${}_{2/3}$FeO${}_{3}$ thin films, commensurate spin ordering is accompanied by charge disproportionation, whereas SrFeO${}_{3}$ thin films show incommensurate helical antiferromagnetic spin ordering due to increased ferromagnetic coupling compared to La${}_{1/3}$Sr${}_{2/3}$FeO${}_{3}$. To understand the photoinduced spin dynamics in these materials, we investigate the spin ordering through time-resolved resonant soft X-ray scattering. In La${}_{1/3}$Sr${}_{2/3}$FeO${}_{3}$, 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 SrFeO${}_{3}$. 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.

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Kohei Yamamoto, Tomoyuki Tsuyama, Suguru Ito, Kou Takubo, Iwao Matsuda, Niko Pontius, Christian Schüßler-Langeheine, Makoto Minohara, Hiroshi Kumigashira, Yuichi Yamasaki, Hironori Nakao, Youichi Murakami, Takayoshi Katase, Toshio Kamiya, Hiroki Wadati. 2021-03-30. Photoinduced Transient States of Antiferromagnetic Orderings in La${}_{1/3}$Sr${}_{2/3}$FeO${}_{3}$ and SrFeO${}_{3}$ Thin Films Observed through Time-resolved Resonant Soft X-ray Scattering. https://doi.org/10.1088/1367-2630/ac5f31

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