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Title: Effects of misfit strain due to epitaxial growth on interface perpendicular magnetic anisotropy in ultrathin Co/Au/Cu(111) films

Abstract

We observe a systematic increase in interface perpendicular magnetic anisotropy (PMA) with increasing Au-interlayer thickness t{sub Au} ranging from 1 to 5 monolayers (MLs) in Cu/Co/Au/Cu(111), where misfit strain in Co due to the epitaxial growth increases with increasing t{sub Au}. This result can be understood within the framework of the magneto-elastic contribution to the interface PMA. With a Cu overlayer, a constant contribution of interface PMA as well as of volume anisotropy is observed when the Co thicknesses are greater than 1.3 ML. However, we have found an unexpected suppression of this variation of interface PMA with the use of Au overlayers instead of Cu ones. With Au or Pd overlayers, the PMA starts to degrade as the Co thickness is reduced below 2.5 ML. (c) 2000 American Institute of Physics.

Authors:
 [1];  [1];  [1];  [1]
  1. Optical Sciences Center and Arizona Research Laboratories, University of Arizona, Tucson, Arizona 85721 (United States)
Publication Date:
OSTI Identifier:
20216263
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 87; Journal Issue: 9; Other Information: PBD: 1 May 2000; Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COBALT; GOLD; COPPER; THIN FILMS; INTERFACES; STRAINS; ANISOTROPY; MAGNETIC PROPERTIES; EXPERIMENTAL DATA

Citation Formats

Murayama, Akihiro, Hyomi, Kyoko, Eickmann, James, and Falco, Charles M. Effects of misfit strain due to epitaxial growth on interface perpendicular magnetic anisotropy in ultrathin Co/Au/Cu(111) films. United States: N. p., 2000. Web. doi:10.1063/1.372624.
Murayama, Akihiro, Hyomi, Kyoko, Eickmann, James, & Falco, Charles M. Effects of misfit strain due to epitaxial growth on interface perpendicular magnetic anisotropy in ultrathin Co/Au/Cu(111) films. United States. doi:10.1063/1.372624.
Murayama, Akihiro, Hyomi, Kyoko, Eickmann, James, and Falco, Charles M. Mon . "Effects of misfit strain due to epitaxial growth on interface perpendicular magnetic anisotropy in ultrathin Co/Au/Cu(111) films". United States. doi:10.1063/1.372624.
@article{osti_20216263,
title = {Effects of misfit strain due to epitaxial growth on interface perpendicular magnetic anisotropy in ultrathin Co/Au/Cu(111) films},
author = {Murayama, Akihiro and Hyomi, Kyoko and Eickmann, James and Falco, Charles M.},
abstractNote = {We observe a systematic increase in interface perpendicular magnetic anisotropy (PMA) with increasing Au-interlayer thickness t{sub Au} ranging from 1 to 5 monolayers (MLs) in Cu/Co/Au/Cu(111), where misfit strain in Co due to the epitaxial growth increases with increasing t{sub Au}. This result can be understood within the framework of the magneto-elastic contribution to the interface PMA. With a Cu overlayer, a constant contribution of interface PMA as well as of volume anisotropy is observed when the Co thicknesses are greater than 1.3 ML. However, we have found an unexpected suppression of this variation of interface PMA with the use of Au overlayers instead of Cu ones. With Au or Pd overlayers, the PMA starts to degrade as the Co thickness is reduced below 2.5 ML. (c) 2000 American Institute of Physics.},
doi = {10.1063/1.372624},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 9,
volume = 87,
place = {United States},
year = {2000},
month = {5}
}