skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

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

Abstract

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
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 117; Journal Issue: 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
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

Citation Formats

Sbiaa, R., E-mail: rachid@squ.edu.om, Ranjbar, M., Åkerman, J., and Materials Physics, School of ICT, Royal Institute of Technology. Domain structures and magnetization reversal in Co/Pd and CoFeB/Pd multilayers. United States: N. p., 2015. Web. doi:10.1063/1.4906281.
Sbiaa, R., E-mail: rachid@squ.edu.om, Ranjbar, M., Åkerman, J., & Materials Physics, School of ICT, Royal Institute of Technology. Domain structures and magnetization reversal in Co/Pd and CoFeB/Pd multilayers. United States. doi:10.1063/1.4906281.
Sbiaa, R., E-mail: rachid@squ.edu.om, Ranjbar, M., Åkerman, J., and Materials Physics, School of ICT, Royal Institute of Technology. Thu . "Domain structures and magnetization reversal in Co/Pd and CoFeB/Pd multilayers". United States. doi:10.1063/1.4906281.
@article{osti_22409994,
title = {Domain structures and magnetization reversal in Co/Pd and CoFeB/Pd multilayers},
author = {Sbiaa, R., E-mail: rachid@squ.edu.om and Ranjbar, M. and Åkerman, J. and Materials Physics, School of ICT, Royal Institute of Technology},
abstractNote = {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.},
doi = {10.1063/1.4906281},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 17,
volume = 117,
place = {United States},
year = {2015},
month = {5}
}