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Title: 90° magnetic coupling in a NiFe/FeMn/biased NiFe multilayer spin valve component investigated by polarized neutron reflectometry

We have observed 90° magnetic coupling in a NiFe/FeMn/biased NiFe multilayer system using polarized neutron reflectometry. Magnetometry results show magnetic switching for both the biased and free NiFe layers, the latter of which reverses at low applied fields. As these measurements are only capable of providing information about the total magnetization within a sample, polarized neutron reflectometry was used to investigate the reversal behavior of the NiFe layers individually. Both the non-spin-flip and spin-flip neutron reflectometry signals were tracked around the free NiFe layer hysteresis loop and were used to detail the evolution of the magnetization during reversal. At low magnetic fields near the free NiFe coercive field, a large spin-flip signal was observed, indicating magnetization aligned perpendicular to both the applied field and pinned layer.
Authors:
;  [1] ;  [2] ;  [3] ;  [2] ; ;  [4] ;  [5] ;  [5] ;  [6]
  1. School of Physics, The University of New South Wales, Sydney, New South Wales 2052 (Australia)
  2. (Australia)
  3. The Institute for Superconducting and Electronic Materials, The University of Wollongong, Wollongong, New South Wales 2522 (Australia)
  4. Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China)
  5. Bragg Institute, Australian Nuclear Science and Technology Organization, Lucas Heights, New South Wales 2234 (Australia)
  6. (Hong Kong)
Publication Date:
OSTI Identifier:
22308481
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 3; Other Information: (c) 2014 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; BINARY ALLOY SYSTEMS; COUPLING; HYSTERESIS; IRON COMPOUNDS; LAYERS; MAGNETIC FIELDS; MAGNETIZATION; MANGANESE COMPOUNDS; NEUTRON REFLECTORS; NEUTRONS; NICKEL COMPOUNDS; SPIN; SPIN FLIP; VALVES