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Title: Laterally patterned spin-valve superlattice: Magnetometry and polarized neutron scattering study

The magnetization reversal of magnetic multilayers with spin-valve like characteristics, patterned into an array of parallel stripes, was structurally and magnetically analyzed, in detail, via x-ray scattering, magnetometry, and polarized neutron reflectivity. Each stripe contains a multiple repetition of the layer sequence [Fe/Cr/Co/Cr]. X-ray and neutron scattering maps of the patterned multilayer show rich details resulting from the superposition of Bragg peaks representing the lateral in-plane periodicity and the out-of-plane multilayer period. Detailed analysis of specular and off-specular polarized neutron intensity was used to ascertain the antiparallel alignment of the Co and Fe magnetization within the kink region of their combined hysteresis loop between the coercive fields of Fe and Co layers. This includes also an examination of domain formation and inter- as well as intra-stripe correlation effects upon magnetization reversal. Our combined study shows that the shape induced anisotropy via patterning is capable of overriding the four-fold crystal anisotropy but is unable to eliminate the ripple domain state of the Co layers, already present in the continuous multilayer.
Authors:
; ;  [1] ;  [1] ;  [2] ;  [1] ;  [3] ;  [4]
  1. Department of Physics, Ruhr-University Bochum, 44780 Bochum (Germany)
  2. (Russian Federation)
  3. (Spain)
  4. University of Applied Science, An der Karlstadt 8, 27568 Bremerhaven (Germany)
Publication Date:
OSTI Identifier:
22399382
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 13; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANISOTROPY; BRAGG CURVE; CHROMIUM; COBALT; CORRELATIONS; CRYSTALS; IRON; LAYERS; MAGNETIZATION; NEUTRON DIFFRACTION; PERIODICITY; REFLECTIVITY; SPIN; SUPERLATTICES; VALVES; X-RAY DIFFRACTION