Annealing dependence of exchange bias in MnO/Ga1-xMnxAs heterostructures

K. F. Eid, O. Maksimov, M. B. Stone, P. Schiffer, N. Samarth

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We discuss the annealing-dependence of exchange bias in Ga1-xMnxAs epilayers that are overgrown with Mn. Although pure Mn is a known antiferromagnet, we find that the asgrown Mn overlayer does not produce any exchange coupling with Ga1-xMnxAs. Rather, our studies indicate that annealing in air is essential for creating the standard signatures of exchange bias (a clear shift in the magnetization hysteresis loop and an increased coercive field). We use X-ray photoelectron spectroscopy to characterize the compositional depth profile of both as-grown and rapid thermal annealed samples. These studies demonstrate that the cleanest exchange bias arises when the Mn overlayer is completely converted into MnO.

Original languageEnglish (US)
Pages (from-to)421-426
Number of pages6
JournalJournal of Superconductivity and Novel Magnetism
Volume18
Issue number3
DOIs
StatePublished - Dec 1 2005

Fingerprint

Heterojunctions
Annealing
Exchange coupling
annealing
Epilayers
Hysteresis loops
Magnetization
X ray photoelectron spectroscopy
Air
hysteresis
signatures
photoelectron spectroscopy
magnetization
shift
air
profiles
x rays
Hot Temperature

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Eid, K. F. ; Maksimov, O. ; Stone, M. B. ; Schiffer, P. ; Samarth, N. / Annealing dependence of exchange bias in MnO/Ga1-xMnxAs heterostructures. In: Journal of Superconductivity and Novel Magnetism. 2005 ; Vol. 18, No. 3. pp. 421-426.
@article{682038b76c2d468c8882529ec46a3990,
title = "Annealing dependence of exchange bias in MnO/Ga1-xMnxAs heterostructures",
abstract = "We discuss the annealing-dependence of exchange bias in Ga1-xMnxAs epilayers that are overgrown with Mn. Although pure Mn is a known antiferromagnet, we find that the asgrown Mn overlayer does not produce any exchange coupling with Ga1-xMnxAs. Rather, our studies indicate that annealing in air is essential for creating the standard signatures of exchange bias (a clear shift in the magnetization hysteresis loop and an increased coercive field). We use X-ray photoelectron spectroscopy to characterize the compositional depth profile of both as-grown and rapid thermal annealed samples. These studies demonstrate that the cleanest exchange bias arises when the Mn overlayer is completely converted into MnO.",
author = "Eid, {K. F.} and O. Maksimov and Stone, {M. B.} and P. Schiffer and N. Samarth",
year = "2005",
month = "12",
day = "1",
doi = "10.1007/S10948-005-0019-9",
language = "English (US)",
volume = "18",
pages = "421--426",
journal = "Journal of Superconductivity and Novel Magnetism",
issn = "1557-1939",
publisher = "Springer New York",
number = "3",

}

Annealing dependence of exchange bias in MnO/Ga1-xMnxAs heterostructures. / Eid, K. F.; Maksimov, O.; Stone, M. B.; Schiffer, P.; Samarth, N.

In: Journal of Superconductivity and Novel Magnetism, Vol. 18, No. 3, 01.12.2005, p. 421-426.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Annealing dependence of exchange bias in MnO/Ga1-xMnxAs heterostructures

AU - Eid, K. F.

AU - Maksimov, O.

AU - Stone, M. B.

AU - Schiffer, P.

AU - Samarth, N.

PY - 2005/12/1

Y1 - 2005/12/1

N2 - We discuss the annealing-dependence of exchange bias in Ga1-xMnxAs epilayers that are overgrown with Mn. Although pure Mn is a known antiferromagnet, we find that the asgrown Mn overlayer does not produce any exchange coupling with Ga1-xMnxAs. Rather, our studies indicate that annealing in air is essential for creating the standard signatures of exchange bias (a clear shift in the magnetization hysteresis loop and an increased coercive field). We use X-ray photoelectron spectroscopy to characterize the compositional depth profile of both as-grown and rapid thermal annealed samples. These studies demonstrate that the cleanest exchange bias arises when the Mn overlayer is completely converted into MnO.

AB - We discuss the annealing-dependence of exchange bias in Ga1-xMnxAs epilayers that are overgrown with Mn. Although pure Mn is a known antiferromagnet, we find that the asgrown Mn overlayer does not produce any exchange coupling with Ga1-xMnxAs. Rather, our studies indicate that annealing in air is essential for creating the standard signatures of exchange bias (a clear shift in the magnetization hysteresis loop and an increased coercive field). We use X-ray photoelectron spectroscopy to characterize the compositional depth profile of both as-grown and rapid thermal annealed samples. These studies demonstrate that the cleanest exchange bias arises when the Mn overlayer is completely converted into MnO.

UR - http://www.scopus.com/inward/record.url?scp=33644945681&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33644945681&partnerID=8YFLogxK

U2 - 10.1007/S10948-005-0019-9

DO - 10.1007/S10948-005-0019-9

M3 - Article

AN - SCOPUS:33644945681

VL - 18

SP - 421

EP - 426

JO - Journal of Superconductivity and Novel Magnetism

JF - Journal of Superconductivity and Novel Magnetism

SN - 1557-1939

IS - 3

ER -