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Title: Attempt to measure magnetic hyperfine fields in metallic thin wires under spin Hall conditions using synchrotron-radiation Mössbauer spectroscopy

Measurement of the magnetic hyperfine fields in metallic thin wires under spin Hall conditions was attempted using the emerging technique, synchrotron-radiation Mössbauer spectroscopy. A Mössbauer probe layer of {sup 57}Fe (0.2 nm), {sup 57}Fe (0.6 nm), or {sup 119}Sn (0.6 nm) was embedded as an electron spin detector near the surfaces of V, Au, Pt, and {sup 56}Fe wires. The magnitudes of the magnetic hyperfine fields at the {sup 57}Fe and {sup 119}Sn nuclear sites that could be enhanced by non-equilibrium conduction-electron spin polarization were measured both without and with the application of an electric current along the wire. Changes in the Mössbauer spectra were not clearly observed, indicating that the magnetic hyperfine field induced by non-equilibrium spin polarization is smaller than the detection limit at least for the measured systems and conditions.
Authors:
;  [1] ;  [2] ; ; ; ;  [3] ;  [4]
  1. Graduate School of Engineering, Nagoya Institute of Technology, Nagoya, Aichi 466-8555 (Japan)
  2. Japan Atomic Energy Agency, Sayo, Hyogo 679-5148 (Japan)
  3. Research Reactor Institute, Kyoto University, Kumatori, Osaka 590-0494 (Japan)
  4. Japan Synchrotron Radiation Research Institute, Sayo, Hyogo 679-5198 (Japan)
Publication Date:
OSTI Identifier:
22410140
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 17; 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 SPECTROSCOPY; ELECTRIC CURRENTS; ELECTRONS; EQUILIBRIUM; GOLD; HALL EFFECT; IRON 56; IRON 57; LAYERS; MOESSBAUER EFFECT; PLATINUM; PROBES; SPIN; SPIN ORIENTATION; SURFACES; SYNCHROTRON RADIATION; TIN 119; VANADIUM