Photo-induced Antiferromagnetic-ferromagnetic Transition and Electronic Structure Modulation in GdBaCo$_2$O$_{5.5}$ Thin Film

Akira Chikamatsu; Christian Sch\"u{\ss}ler-Langeheine; Hiroki Wadati; Keisuke Ikeda; Kohei Yamagami; Kohei Yamamoto; Kou Takubo; Niko Pontius; Tetsuya Hasegawa; Tsukasa Katayama

arxiv: 2105.10083 · v1 · pith:7AHOVT2Hnew · submitted 2021-05-21 · ❄️ cond-mat.str-el

Photo-induced Antiferromagnetic-ferromagnetic Transition and Electronic Structure Modulation in GdBaCo₂O_(5.5) Thin Film

Yujun Zhang , Tsukasa Katayama , Akira Chikamatsu , Christian Sch\"u{\ss}ler-Langeheine , Niko Pontius , Yasuyuki Hirata , Kou Takubo , Kohei Yamagami

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Keisuke Ikeda Kohei Yamamoto Tetsuya Hasegawa Hiroki Wadati

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classification ❄️ cond-mat.str-el

keywords photo-inducedtransitionxmcdrfilmgdbacomagneticreflectivityrmxd

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We investigate both the ferromagnetic (FM) and antiferromagnetic (AFM) ultrafast dynamics of a strongly correlated oxide system, GdBaCo$_2$O$_{5.5}$ thin 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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Photo-induced Antiferromagnetic-ferromagnetic Transition and Electronic Structure Modulation in GdBaCo₂O_(5.5) Thin Film

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