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Title: Toward broad-band x-ray detected ferromagnetic resonance in longitudinal geometry

An ultrahigh-vacuum-compatible setup for broad-band X-ray detected ferromagnetic resonance (XFMR) in longitudinal geometry is introduced which relies on a low-power, continuous-wave excitation of the ferromagnetic sample. A simultaneous detection of the conventional ferromagnetic resonance via measuring the reflected microwave power and the XFMR signal of the X-ray absorption is possible. First experiments on the Fe and Co L{sub 3}-edges of a permalloy film covered with Co nanostripes as well as the Fe and Ni K-edges of a permalloy film are presented and discussed. Two different XFMR signals are found, one of which is independent of the photon energy and therefore does not provide element-selective information. The other much weaker signal is element-selective, and the dynamic magnetic properties could be detected for Fe and Co separately. The dependence of the latter XFMR signal on the photon helicity of the synchrotron light is found to be distinct from the usual x-ray magnetic circular dichroism effect.
Authors:
 [1] ;  [2] ; ; ; ; ; ;  [1] ; ;  [1] ;  [3]
  1. Fakultät für Physik, Universität Duisburg-Essen, Lotharstr. 1, 47057 Duisburg (Germany)
  2. (ESRF), CS 40220, 38043 Grenoble Cedex (France)
  3. (Austria)
Publication Date:
OSTI Identifier:
22412914
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 22; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION; COBALT; EXCITATION; FERROMAGNETIC MATERIALS; FERROMAGNETIC RESONANCE; FILMS; HELICITY; IRON; MAGNETIC CIRCULAR DICHROISM; MAGNETIC PROPERTIES; MICROWAVE RADIATION; PERMALLOY; PHOTONS; VISIBLE RADIATION; X RADIATION