Photo-induced antiferromagnetic-ferromagnetic and spin-state transition in a double-perovskite cobalt oxide thin film

Photo-induced antiferromagnetic-ferromagnetic and spin-state transition in a double-perovskite cobalt oxide thin film
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双钙钛矿钴氧化物薄膜中光致反铁磁-铁磁和自旋态转变

DOI:
10.1038/s42005-022-00823-4
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发表时间:
2022
影响因子:
5.5
通讯作者:
Wadati Hiroki
Wadati Hiroki
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
Zhang Yujun;Katayama Tsukasa;Chikamatsu Akira;Schussler-Langeheine Christian;Pontius Niko;Hirata Yasuyuki;Takubo Kou;Yamagami Kohei;Ikeda Keisuke;Yamamoto Kohei;Hasegawa Tetsuya;Wadati Hiroki

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利用时间分辨X射线磁圆二色反射谱(XMCDR)和共振磁X射线衍射(RMXD)研究了强关联氧化物系统GdBaCoO薄膜的铁磁(FM)和反铁磁(AFM)超快动力学.观察到光致AFM-FM转变,其特征在于瞬态XMCDR超过未泵浦值的增加和RMXD的衰减。瞬态XMCDR和反射率的光子能量依赖性可能被解释为伴随的光诱导自旋态转变。
We investigate both the ferromagnetic (FM) and antiferromagnetic (AFM) ultrafast dynamics of a strongly correlated oxide system, GdBaCoOthin film, by time-resolved x-ray magnetic circular dichroism in reflectivity (XMCDR) and resonant magnetic x-ray diffraction (RMXD). A photo-induced AFM-FM transition characterized by an increase of the transient XMCDR beyond the unpumped value and a decay of RMXD was observed. The photon-energy dependence of the transient XMCDR and reflectivity can likely be interpreted as a concomitant photo-induced spinstate transition.
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