Photoinduced transient states of antiferromagnetic orderings in La<sub>1/3</sub>Sr<sub>2/3</sub>FeO<sub>3</sub> and SrFeO<sub>3-δ</sub> thin films observed through time-resolved resonant soft x-ray scattering
Photoinduced transient states of antiferromagnetic orderings in La<sub>1/3</sub>Sr<sub>2/3</sub>FeO<sub>3</sub> and SrFeO<sub>3-δ</sub> thin films observed through time-resolved resonant soft x-ray scattering
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La<sub>1/3</sub>Sr<sub>2/3</sub>FeO<sub>3</sub> 和 SrFeO<sub>3-δ</sub> 中反铁磁有序的光致瞬态通过时间分辨共振软 X 射线散射观察薄膜
DOI：
10.1088/1367-2630/ac5f31
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发表时间：
2022
影响因子：
3.3
通讯作者：
Wadati Hiroki
中科院分区：
文献类型：
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作者：
Yamamoto Kohei;Tsuyama Tomoyuki;Ito Suguru;Takubo Kou;Matsuda Iwao;Pontius Niko;Schussler-Langeheine Christian;Minohara Makoto;Kumigashira Hiroshi;Yamasaki Yuichi;Nakao Hironori;Murakami Youichi;Katase Takayoshi;Kamiya Toshio;Wadati Hiroki
本研究研究了反铁磁钙钛矿中磁相互作用与光致动力学之间的关系。在La 1/3 Sr 2/3 FeO 3 薄膜中，相应的自旋排序伴随着电荷歧化，而SrFeO 3− δ 薄膜由于与La 1/3 Sr 2/3 FeO 3 相比增加的铁磁耦合而表现出不相称的螺旋反铁磁自旋排序。为了了解这些材料中的光致自旋动力学，我们通过时间分辨共振软体研究了自旋排序X 射线散射。在 La 1/3 Sr 2/3 FeO 3 中，观察到通过非热过程在 130 fs 内磁有序的超快淬灭，这是由 Fe 原子之间的电荷转移触发的。我们将其与 SrFeO 3− δ 螺旋磁序的光致动力学进行比较。我们发现通过光感应电荷转移改变磁耦合可以为自旋顺序操纵提供更有效的通道。
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− δ 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− 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.