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Precessional dynamics of elemental moments in a ferromagnetic alloy

W. E. Bailey, L. Cheng, D. J. Keavney, C.-C. Kao, E. Vescovo, D. A. Arena
2004 Physical Review B  

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2004 pre-print
arXiv:cond-mat/0405295v1 fatcat:jkgzolmwbjdwrfaal62l6aluoi
We demonstrate an element-specific measurement of magnetization precession in a metallic ferromagnetic alloy, separating Ni and Fe moment motion in Ni81Fe19. Pump-probe X-ray magnetic circular dichroism (XMCD), synchronized with short magnetic field pulses, is used to measure free magnetization oscillations up to 2.6 GHz with elemental specificity and a rotational resolution of < 2 deg. Magnetic moments residing on Ni sites and Fe sites in a Ni81Fe19(50nm) thin film are found to precess
more » ... to precess together at all frequencies, coupled in phase within instrumental resolution of 90 ps.
doi:10.1103/physrevb.70.172403 fatcat:sk3xfe6fkncvhpn5hnn342ohb4
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W. E. Bailey, L. Cheng, D. J. Keavney, C.-C. Kao, E. Vescovo, D. A. Arena. "Precessional dynamics of elemental moments in a ferromagnetic alloy." Physical Review B 70.17 (2004)