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Title: Domain structures and magnetization reversal in Co/Pd and CoFeB/Pd multilayers

Domain structures and magnetization reversal of (Co/Pd) and (CoFeB/Pd) multilayers with 7 and 14 repeats were investigated. The Co-based multilayers show much larger coercivities, a better squareness, and a sharper magnetization switching than CoFeB-based multilayers. From magnetic force microscopy observations, both structures show strong reduction in domains size as the number of repeats increases but the magnetic domains for Co-based multilayers are more than one order of magnitude larger than for CoFeB-based multilayers. By imaging domains at different times, breaks in the (CoFeB/Pd) multilayer stripes were observed within only few hours, while no change could be seen for (Co/Pd) multilayers. Although CoFeB single layers are suitable for magnetoresistive devices due to their large spin polarization and low damping constants, their lamination with Pd suffers mainly from thermal instability.
Authors:
 [1] ;  [2] ;  [2] ;  [3]
  1. Department of Physics, Sultan Qaboos University, P.O. Box 36, PC 123 (Oman)
  2. Physics Department, University of Gothenburg, 412 96 Gothenburg (Sweden)
  3. (KTH), 164 40 Kista (Sweden)
Publication Date:
OSTI Identifier:
22409994
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; ATOMIC FORCE MICROSCOPY; COBALT; COERCIVE FORCE; DOMAIN STRUCTURE; IRON BORIDES; LAYERS; MAGNETIC FIELDS; MAGNETIZATION; MAGNETORESISTANCE; MAGNETOSTRICTION; PALLADIUM; SPIN ORIENTATION