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| VOLUME 82 | ISSUE 11 |
PAGE 791
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| X-ray detected magnetic resonance at the Fe K-edge in YIG: forced precession of magnetically polarized orbital components
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J. Goulon, A. Rogalev, F. Wilhelm, N. Jaouen, C. Goulon-Ginet, G. Goujon, J. Ben Youssef+, M. V. Indenbom+
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PACS: 75.25.+z, 76.50.+g, 78.20.Ls, 78.47.+p
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Abstract
X-ray Detected Magnetic Resonance (XDMR) has been measured for the
first time on exciting the Fe K-edge in a high quality
Yttrium Iron Garnet film epitaxially grown on a
Gadolinium Callium Garnet substrate.
This challenging experiment required resonant pumping of
Yttrium Iron Garnet
at
high microwave power, i.e. in the foldover regime. X-ray Magnetic
Circular Dichroism (XMCD) was used to probe the change in the longitudinal
component of the magnetization MZ induced by the precession of magnetic
moments located at the iron sites. Since XMCD at the Fe K-edge refers mostly
to the equilibrium contribution of magnetically polarized 4p orbital
components, XDMR at the Fe K-edge should reflect the precessional dynamics of
the latter orbital moments. From the measured precession angle, we show that
there is no dynamical quenching of the polarized orbital components at the
iron sites in Yttrium Iron Garnet.
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