Ultrafast optical detection of magnetic inhomogeneity in ferromagnetic La0.67Ca0.33MnO3

Y. Gong; Z. Zhang; D. Ascienzo; Y. Abranyos; H. B. Zhao; G. Lüpke; Qi Li; Y. H. Ren

doi:10.1209/0295-5075/108/17010

Ultrafast optical detection of magnetic inhomogeneity in ferromagnetic La_0.67Ca_0.33MnO₃

Y. Gong, Z. Zhang, D. Ascienzo, Y. Abranyos, H. B. Zhao, G. Lüpke, Qi Li, Y. H. Ren

Research output: Contribution to journal › Article › peer-review

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Abstract

Optically excited spin wave resonances in ferromagnetic La0.67Ca0.33MnO3 (LCMO) thin films are probed by subpicosecond Kerr-rotation experiments at 10 K. We identify an extra fundamental mode along with the confined spin wave modes, whose frequency and intensity are independent of film thickness, but depend strongly on the applied magnetic field. We attribute the origin of this mode to magnetic inhomogeneity at the FM ground state. Our results show that the picosecond time-resolved magneto-optical method is a powerful tool for detecting dynamic magnetic inhomogeneity in colossal magneto-resistance manganites.

Original language	English (US)
Article number	17010
Journal	Europhysics Letters
Volume	108
Issue number	1
DOIs	https://doi.org/10.1209/0295-5075/108/17010
State	Published - Oct 1 2014

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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title = "Ultrafast optical detection of magnetic inhomogeneity in ferromagnetic La0.67Ca0.33MnO3",

abstract = "Optically excited spin wave resonances in ferromagnetic La0.67Ca0.33MnO3 (LCMO) thin films are probed by subpicosecond Kerr-rotation experiments at 10 K. We identify an extra fundamental mode along with the confined spin wave modes, whose frequency and intensity are independent of film thickness, but depend strongly on the applied magnetic field. We attribute the origin of this mode to magnetic inhomogeneity at the FM ground state. Our results show that the picosecond time-resolved magneto-optical method is a powerful tool for detecting dynamic magnetic inhomogeneity in colossal magneto-resistance manganites.",

author = "Y. Gong and Z. Zhang and D. Ascienzo and Y. Abranyos and Zhao, {H. B.} and G. L{\"u}pke and Qi Li and Ren, {Y. H.}",

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T1 - Ultrafast optical detection of magnetic inhomogeneity in ferromagnetic La0.67Ca0.33MnO3

AU - Gong, Y.

AU - Zhang, Z.

AU - Ascienzo, D.

AU - Abranyos, Y.

AU - Zhao, H. B.

AU - Lüpke, G.

AU - Li, Qi

AU - Ren, Y. H.

PY - 2014/10/1

Y1 - 2014/10/1

N2 - Optically excited spin wave resonances in ferromagnetic La0.67Ca0.33MnO3 (LCMO) thin films are probed by subpicosecond Kerr-rotation experiments at 10 K. We identify an extra fundamental mode along with the confined spin wave modes, whose frequency and intensity are independent of film thickness, but depend strongly on the applied magnetic field. We attribute the origin of this mode to magnetic inhomogeneity at the FM ground state. Our results show that the picosecond time-resolved magneto-optical method is a powerful tool for detecting dynamic magnetic inhomogeneity in colossal magneto-resistance manganites.

AB - Optically excited spin wave resonances in ferromagnetic La0.67Ca0.33MnO3 (LCMO) thin films are probed by subpicosecond Kerr-rotation experiments at 10 K. We identify an extra fundamental mode along with the confined spin wave modes, whose frequency and intensity are independent of film thickness, but depend strongly on the applied magnetic field. We attribute the origin of this mode to magnetic inhomogeneity at the FM ground state. Our results show that the picosecond time-resolved magneto-optical method is a powerful tool for detecting dynamic magnetic inhomogeneity in colossal magneto-resistance manganites.

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Ultrafast optical detection of magnetic inhomogeneity in ferromagnetic La_0.67Ca_0.33MnO₃

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