Effect of interface roughness on exchange bias of an uncompensated interface: Monte Carlo simulation

Ying Li, Jung Hwan Moon, Kyoung Jin Lee

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

By means of Monte Carlo simulation, we investigate the effects of interface roughness and temperature on the exchange bias and coercivity in ferromagnetic (FM)/antiferromagnetic (AFM) bilayers. Both exchange bias and coercivity are strongly dependent on interface roughness. For a perfect uncompensated interface a domain wall is formed in the AFM system during FM reversal, which results in a very small exchange bias. However, a finite interface roughness leads to a finite value of the exchange bias due to the existence of pinned spins at the AFM surface adjacent to the mixed interface. It is observed that the exchange bias decreases with increasing temperature, consistent with the experimental results. It is also observed that a bump in coercivity occurs around the blocking temperature.

Original languageEnglish
Pages (from-to)323-327
Number of pages5
JournalJournal of Magnetics
Volume16
Issue number4
Publication statusPublished - 2011 Dec 31

Fingerprint

Coercive force
roughness
Surface roughness
coercivity
simulation
Domain walls
Temperature
temperature
domain wall
Monte Carlo simulation

Keywords

  • Exchange bias
  • Interface roughness
  • Monte Carlo simulation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

Effect of interface roughness on exchange bias of an uncompensated interface : Monte Carlo simulation. / Li, Ying; Moon, Jung Hwan; Lee, Kyoung Jin.

In: Journal of Magnetics, Vol. 16, No. 4, 31.12.2011, p. 323-327.

Research output: Contribution to journalArticle

@article{0a58925355474335baad3fa351b98416,
title = "Effect of interface roughness on exchange bias of an uncompensated interface: Monte Carlo simulation",
abstract = "By means of Monte Carlo simulation, we investigate the effects of interface roughness and temperature on the exchange bias and coercivity in ferromagnetic (FM)/antiferromagnetic (AFM) bilayers. Both exchange bias and coercivity are strongly dependent on interface roughness. For a perfect uncompensated interface a domain wall is formed in the AFM system during FM reversal, which results in a very small exchange bias. However, a finite interface roughness leads to a finite value of the exchange bias due to the existence of pinned spins at the AFM surface adjacent to the mixed interface. It is observed that the exchange bias decreases with increasing temperature, consistent with the experimental results. It is also observed that a bump in coercivity occurs around the blocking temperature.",
keywords = "Exchange bias, Interface roughness, Monte Carlo simulation",
author = "Ying Li and Moon, {Jung Hwan} and Lee, {Kyoung Jin}",
year = "2011",
month = "12",
day = "31",
language = "English",
volume = "16",
pages = "323--327",
journal = "Journal of Magnetics",
issn = "1226-1750",
publisher = "The Korean Magnestics Society",
number = "4",

}

TY - JOUR

T1 - Effect of interface roughness on exchange bias of an uncompensated interface

T2 - Monte Carlo simulation

AU - Li, Ying

AU - Moon, Jung Hwan

AU - Lee, Kyoung Jin

PY - 2011/12/31

Y1 - 2011/12/31

N2 - By means of Monte Carlo simulation, we investigate the effects of interface roughness and temperature on the exchange bias and coercivity in ferromagnetic (FM)/antiferromagnetic (AFM) bilayers. Both exchange bias and coercivity are strongly dependent on interface roughness. For a perfect uncompensated interface a domain wall is formed in the AFM system during FM reversal, which results in a very small exchange bias. However, a finite interface roughness leads to a finite value of the exchange bias due to the existence of pinned spins at the AFM surface adjacent to the mixed interface. It is observed that the exchange bias decreases with increasing temperature, consistent with the experimental results. It is also observed that a bump in coercivity occurs around the blocking temperature.

AB - By means of Monte Carlo simulation, we investigate the effects of interface roughness and temperature on the exchange bias and coercivity in ferromagnetic (FM)/antiferromagnetic (AFM) bilayers. Both exchange bias and coercivity are strongly dependent on interface roughness. For a perfect uncompensated interface a domain wall is formed in the AFM system during FM reversal, which results in a very small exchange bias. However, a finite interface roughness leads to a finite value of the exchange bias due to the existence of pinned spins at the AFM surface adjacent to the mixed interface. It is observed that the exchange bias decreases with increasing temperature, consistent with the experimental results. It is also observed that a bump in coercivity occurs around the blocking temperature.

KW - Exchange bias

KW - Interface roughness

KW - Monte Carlo simulation

UR - http://www.scopus.com/inward/record.url?scp=84863034089&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84863034089&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:84863034089

VL - 16

SP - 323

EP - 327

JO - Journal of Magnetics

JF - Journal of Magnetics

SN - 1226-1750

IS - 4

ER -