Magnetic and first-order reversal curve investigations of antiferromagnetically coupled nanostructures of Co/Pd multilayers

S. N. Piramanayagam, Mojtaba Ranjbar, Rachid Sbiaa, Chong Tow Chong

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2 Citations (Scopus)

Abstract

Magnetic properties of nanostructures of antiferromagnetically coupled (AFC) Co/Pd multilayers were studied using hysteresis loop and first order reversal curve (FORC) measurements. The thickness of Co sublayer in the stabilizing layer of the AFC was increased in order to reduce the anisotropy constant of the stabilizing layer. It was noticed that the (Co/Pd) ×3 multilayer stack showed a perpendicular magnetic anisotropy (PMA) even when the thickness of Co sublayer was increased to 1 nm. Antiferromagnetic coupling is explained to be the cause of such a PMA. The nanostructures do not show AFC at remanence for Co sublayer thickness below 0.8 nm. AFC at remanence was achieved for Co sublayer thickness of 1 nm. The FORC data indicated four peaks in the case of AFC structures, whereas a single peak was observed in single layered structures and samples where the stabilizing layers did not have a PMA. The observations are fundamentally interesting and useful in reducing switching field distribution in patterned media.

Original languageEnglish
Article number6332895
Pages (from-to)3410-3413
Number of pages4
JournalIEEE Transactions on Magnetics
Volume48
Issue number11
DOIs
Publication statusPublished - 2012

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Keywords

  • First order reversal curves
  • Magnetic nanostructures
  • Magnetic recording
  • Patterned media
  • Recording media

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

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