Open AccessElement‐selective X‐ray detected magnetic resonance: a novel application of synchrotron radiation
Author(s) -
Goulon J.,
Rogalev A.,
Wilhelm F.,
GoulonGinet Ch.,
Goujon G.
Publication year - 2007
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s0909049507011260
Subject(s) - yttrium iron garnet , magnetization , magnetic circular dichroism , ferrimagnetism , condensed matter physics , synchrotron radiation , diamagnetism , materials science , paramagnetism , spin (aerodynamics) , yttrium , nuclear magnetic resonance , magnetic field , chemistry , physics , optics , spectral line , quantum mechanics , astronomy , thermodynamics , oxide , metallurgy
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.