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

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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 languageEnglish (US)
Article number17010
JournalEPL
Volume108
Issue number1
DOIs
StatePublished - Oct 1 2014

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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    Gong, Y., Zhang, Z., Ascienzo, D., Abranyos, Y., Zhao, H. B., Lüpke, G., Li, Q., & Ren, Y. H. (2014). Ultrafast optical detection of magnetic inhomogeneity in ferromagnetic La0.67Ca0.33MnO3. EPL, 108(1), [17010]. https://doi.org/10.1209/0295-5075/108/17010