Element‐selective X‐ray detected magnetic resonance: a novel application of synchrotron radiation

X‐ray detected magnetic resonance (XDMR) is a new element‐selective spectroscopy in which X‐ray magnetic circular dichroism is used to probe the resonant precession of spin and orbital magnetization components when a strong microwave pump field is applied perpendicularly to the static bias field. Ex...

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Bibliographic Details
Published in:Journal of synchrotron radiation 2007-05, Vol.14 (3), p.257-271
Main Authors: Goulon, J., Rogalev, A., Wilhelm, F., Goulon‐Ginet, Ch, Goujon, G.
Format: Article
Language:English
Subjects:
Circular Dichroism - methods
ferromagnetic resonance
Iron - chemistry
Magnetic Resonance Spectroscopy - methods
Magnetics
magneto‐optical effects
Microwaves
X-Rays
X‐ray absorption spectra
X‐ray magnetic circular dichroism
Yttrium - chemistry
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Summary:X‐ray detected magnetic resonance (XDMR) is a new element‐selective spectroscopy in which X‐ray magnetic circular dichroism is used to probe the resonant precession of spin and orbital magnetization components when a strong microwave pump field is applied perpendicularly to the static bias field. Experimental configurations suitable for detecting the very weak XDMR signal are compared. XDMR signatures were measured in yttrium iron garnet and related thin films on exciting not only the iron K‐edge but also the yttrium at diamagnetic sites. These measurements are shown to yield unique information regarding the wide‐angle precession of induced magnetization components involving either orbital p‐projected densities of states at the iron sites, or spin polarized d‐projected densities of states at the yttrium sites. Extending XDMR measurements into the millimeter wave range would make it possible to study paramagnetic systems routinely and investigate optical modes as well as acoustic modes in ferrimagnetic/antiferromagnetic systems.
ISSN:1600-5775
0909-0495
1600-5775
DOI:10.1107/S0909049507011260