Magnetic anisotropy and microstructure in molecular beam epitaxial FePt (110)/MgO (110)

R. F C Farrow, D. Weller, R. F. Marks, M. F. Toney, David Smith, Martha McCartney

Research output: Contribution to journalArticle

61 Citations (Scopus)

Abstract

We compare the growth, structural, and magnetic properties of Fe xPt 1-x(x≃0.6) films grown by molecular beam epitaxy on MgO (110) substrates held at 300 and 500 °C. Growth at both temperatures yields nearly single orientation epitaxial films with FePt, Pt [001]//MgO[001] and FePt, Pt (110)//MgO (110). For growth at 300 °C, chemical ordering to the L1 0 (CuAu I) tetragonal phase is incomplete (long-range order parameter, S=0.38) in contrast with growth at 500 °C for which ordering is nearly complete (S=0.81). Despite incomplete chemical ordering, a large two-fold, in-plane magnetic anisotropy (K u=1.5×10 erg/cm) is present for the film grown at 300 °C. Transmission electron microscopy for the 300 °C film confirms epitaxial growth with few extended defects but also reveals that chemical ordering is distributed inhomogeneously within the film. The direction of ordering is generally uniform (c axis along MgO [001]) but variations in the degree of ordering are evident on a length scale of 1-10 nm.

Original languageEnglish (US)
Pages (from-to)934-939
Number of pages6
JournalJournal of Applied Physics
Volume84
Issue number2
StatePublished - Jul 15 1998

Fingerprint

molecular beams
microstructure
anisotropy
molecular beam epitaxy
magnetic properties
transmission electron microscopy
defects
temperature

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)

Cite this

Magnetic anisotropy and microstructure in molecular beam epitaxial FePt (110)/MgO (110). / Farrow, R. F C; Weller, D.; Marks, R. F.; Toney, M. F.; Smith, David; McCartney, Martha.

In: Journal of Applied Physics, Vol. 84, No. 2, 15.07.1998, p. 934-939.

Research output: Contribution to journalArticle

Farrow, R. F C ; Weller, D. ; Marks, R. F. ; Toney, M. F. ; Smith, David ; McCartney, Martha. / Magnetic anisotropy and microstructure in molecular beam epitaxial FePt (110)/MgO (110). In: Journal of Applied Physics. 1998 ; Vol. 84, No. 2. pp. 934-939.
@article{85138d9d30b54ab1bd96a9bd758aaba7,
title = "Magnetic anisotropy and microstructure in molecular beam epitaxial FePt (110)/MgO (110)",
abstract = "We compare the growth, structural, and magnetic properties of Fe xPt 1-x(x≃0.6) films grown by molecular beam epitaxy on MgO (110) substrates held at 300 and 500 °C. Growth at both temperatures yields nearly single orientation epitaxial films with FePt, Pt [001]//MgO[001] and FePt, Pt (110)//MgO (110). For growth at 300 °C, chemical ordering to the L1 0 (CuAu I) tetragonal phase is incomplete (long-range order parameter, S=0.38) in contrast with growth at 500 °C for which ordering is nearly complete (S=0.81). Despite incomplete chemical ordering, a large two-fold, in-plane magnetic anisotropy (K u=1.5×10 erg/cm) is present for the film grown at 300 °C. Transmission electron microscopy for the 300 °C film confirms epitaxial growth with few extended defects but also reveals that chemical ordering is distributed inhomogeneously within the film. The direction of ordering is generally uniform (c axis along MgO [001]) but variations in the degree of ordering are evident on a length scale of 1-10 nm.",
author = "Farrow, {R. F C} and D. Weller and Marks, {R. F.} and Toney, {M. F.} and David Smith and Martha McCartney",
year = "1998",
month = "7",
day = "15",
language = "English (US)",
volume = "84",
pages = "934--939",
journal = "Journal of Applied Physics",
issn = "0021-8979",
publisher = "American Institute of Physics Publising LLC",
number = "2",

}

TY - JOUR

T1 - Magnetic anisotropy and microstructure in molecular beam epitaxial FePt (110)/MgO (110)

AU - Farrow, R. F C

AU - Weller, D.

AU - Marks, R. F.

AU - Toney, M. F.

AU - Smith, David

AU - McCartney, Martha

PY - 1998/7/15

Y1 - 1998/7/15

N2 - We compare the growth, structural, and magnetic properties of Fe xPt 1-x(x≃0.6) films grown by molecular beam epitaxy on MgO (110) substrates held at 300 and 500 °C. Growth at both temperatures yields nearly single orientation epitaxial films with FePt, Pt [001]//MgO[001] and FePt, Pt (110)//MgO (110). For growth at 300 °C, chemical ordering to the L1 0 (CuAu I) tetragonal phase is incomplete (long-range order parameter, S=0.38) in contrast with growth at 500 °C for which ordering is nearly complete (S=0.81). Despite incomplete chemical ordering, a large two-fold, in-plane magnetic anisotropy (K u=1.5×10 erg/cm) is present for the film grown at 300 °C. Transmission electron microscopy for the 300 °C film confirms epitaxial growth with few extended defects but also reveals that chemical ordering is distributed inhomogeneously within the film. The direction of ordering is generally uniform (c axis along MgO [001]) but variations in the degree of ordering are evident on a length scale of 1-10 nm.

AB - We compare the growth, structural, and magnetic properties of Fe xPt 1-x(x≃0.6) films grown by molecular beam epitaxy on MgO (110) substrates held at 300 and 500 °C. Growth at both temperatures yields nearly single orientation epitaxial films with FePt, Pt [001]//MgO[001] and FePt, Pt (110)//MgO (110). For growth at 300 °C, chemical ordering to the L1 0 (CuAu I) tetragonal phase is incomplete (long-range order parameter, S=0.38) in contrast with growth at 500 °C for which ordering is nearly complete (S=0.81). Despite incomplete chemical ordering, a large two-fold, in-plane magnetic anisotropy (K u=1.5×10 erg/cm) is present for the film grown at 300 °C. Transmission electron microscopy for the 300 °C film confirms epitaxial growth with few extended defects but also reveals that chemical ordering is distributed inhomogeneously within the film. The direction of ordering is generally uniform (c axis along MgO [001]) but variations in the degree of ordering are evident on a length scale of 1-10 nm.

UR - http://www.scopus.com/inward/record.url?scp=0001208709&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0001208709&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0001208709

VL - 84

SP - 934

EP - 939

JO - Journal of Applied Physics

JF - Journal of Applied Physics

SN - 0021-8979

IS - 2

ER -