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

Research output: Contribution to journalArticle

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

Fingerprint

Magnetic anisotropy
Nanostructures
Multilayers
Remanence
Hysteresis loops
Magnetic properties
Anisotropy

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

Cite this

Magnetic and first-order reversal curve investigations of antiferromagnetically coupled nanostructures of Co/Pd multilayers. / Piramanayagam, S. N.; Ranjbar, Mojtaba; Sbiaa, Rachid; Chong, Chong Tow.

In: IEEE Transactions on Magnetics, Vol. 48, No. 11, 6332895, 2012, p. 3410-3413.

Research output: Contribution to journalArticle

@article{294d63f0a3954ea28b38d448034f2872,
title = "Magnetic and first-order reversal curve investigations of antiferromagnetically coupled nanostructures of Co/Pd multilayers",
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.",
keywords = "First order reversal curves, Magnetic nanostructures, Magnetic recording, Patterned media, Recording media",
author = "Piramanayagam, {S. N.} and Mojtaba Ranjbar and Rachid Sbiaa and Chong, {Chong Tow}",
year = "2012",
doi = "10.1109/TMAG.2012.2207883",
language = "English",
volume = "48",
pages = "3410--3413",
journal = "IEEE Transactions on Magnetics",
issn = "0018-9464",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "11",

}

TY - JOUR

T1 - Magnetic and first-order reversal curve investigations of antiferromagnetically coupled nanostructures of Co/Pd multilayers

AU - Piramanayagam, S. N.

AU - Ranjbar, Mojtaba

AU - Sbiaa, Rachid

AU - Chong, Chong Tow

PY - 2012

Y1 - 2012

N2 - 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.

AB - 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.

KW - First order reversal curves

KW - Magnetic nanostructures

KW - Magnetic recording

KW - Patterned media

KW - Recording media

UR - http://www.scopus.com/inward/record.url?scp=84867796225&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84867796225&partnerID=8YFLogxK

U2 - 10.1109/TMAG.2012.2207883

DO - 10.1109/TMAG.2012.2207883

M3 - Article

VL - 48

SP - 3410

EP - 3413

JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

SN - 0018-9464

IS - 11

M1 - 6332895

ER -