Interfacial tuning of perpendicular magnetic anisotropy and spin magnetic moment in CoFe/Pd multilayers

Duc-The Ngo, Z. L. Meng, T. Tahmasebi, X. Yu, E. Thoeng, L. H. Yeo, A. Rusydi, G. C. Han, K-L Teo

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

We report on a strong perpendicular magnetic anisotropy in [CoFe 0.4 nm/Pd t](6) (t=1.0-2.0 nm) multilayers fabricated by DC sputtering in an ultrahigh vacuum chamber. Saturation magnetization, M-s, and uniaxial anisotropy, K-u, of the multilayers decrease with increasing the spacing thickness; with a M-s of 155 emu/cc and a K-u of 1.14 x 10(5) J/m(3) at a spacing thickness of t=2 nm. X-ray absorption spectroscopy and X-ray magnetic circular dichroism measurements reveal that spin and orbital magnetic moments of Co and Fe in CoFe film decrease as a function of Pd thickness, indicating the major contribution of surface/interfacial magnetism to the magnetic properties of the film. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.
Original languageEnglish
JournalJournal of Magnetism and Magnetic Materials
Volume350
Pages (from-to)42-46
Number of pages5
ISSN0304-8853
DOIs
Publication statusPublished - 2014
Externally publishedYes

Keywords

  • Magnetic multilayers
  • Perpendicular magnetic anisotropy
  • Magnetic domains and domain walls
  • Interfacial magnetism
  • X-ray magnetic circular dischroism
  • MATERIALS
  • PHYSICS,
  • RAY CIRCULAR-DICHROISM
  • DOMAIN-WALL
  • MAGNETORESISTANCE
  • SURFACE
  • FILMS
  • Cobalt
  • Magnetic anisotropy
  • Magnetic domains
  • Magnetic moments
  • X ray absorption spectroscopy
  • Multilayers
  • DC sputtering
  • Pd thickness
  • Spin and orbital magnetic moments
  • Spin magnetic moments
  • Ultra-high vacuum chamber
  • Uniaxial anisotropy
  • X-ray magnetic circular dichroism
  • cond-mat.mes-hall cond-mat.mtrl-sci

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