Molecular beam epitaxial growth and properties of CoFe2O4 on MgO(0 0 1)

S. A. Chambers; R. F.C. Farrow; S. Maat; M. F. Toney; L. Folks; J. G. Catalano; T. P. Trainor; G. E. Brown

doi:10.1016/S0304-8853(02)00039-2

Molecular beam epitaxial growth and properties of CoFe₂O₄ on MgO(0 0 1)

S. A. Chambers, R. F.C. Farrow, S. Maat, M. F. Toney, L. Folks, J. G. Catalano, T. P. Trainor, G. E. Brown

Research output: Contribution to journal › Article › peer-review

135 Scopus citations

Abstract

We have grown single-crystal Co ferrite (CoFe₂O₄) on MgO(0 0 1) by oxygen-plasma-assisted molecular beam epitaxy (OPA-MBE), and have characterized the composition, structure, surface morphology, and magnetic properties by a number of methods. The as-grown OPA-MBE material forms a perfect inverse spinel, in which all Co is in the 2+ formal oxidation state, and occupies octahedral sites within the cation sublattice. The OPA-MBE film surfaces are very flat, with mean roughnesses of only a few Å, and exhibit large, stable magnetic domains. The measured moment per unit volume is 250 emu/cm³, and the saturation magnetization for films in the 1000 Å film thickness range is ∼60% of that of bulk Co ferrite. The material also exhibits strain-dependent magnetic anisotropy that can be understood by considering the various contributions to the total magnetic energy. The overall quality of epitaxial Co ferrite grown on MgO by OPA-MBE is superior in every respect to that obtained using pulsed laser deposition as the growth method.

Original language	English (US)
Pages (from-to)	124-139
Number of pages	16
Journal	Journal of Magnetism and Magnetic Materials
Volume	246
Issue number	1-2
DOIs	https://doi.org/10.1016/S0304-8853(02)00039-2
State	Published - Apr 2002
Externally published	Yes

Keywords

Cobalt ferrite
Magnetic and structural properties
Molecular beam epitaxy

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1016/S0304-8853(02)00039-2

Cite this

@article{f344fa7733f1468bb46c914386ecc6a5,

title = "Molecular beam epitaxial growth and properties of CoFe2O4 on MgO(0 0 1)",

abstract = "We have grown single-crystal Co ferrite (CoFe2O4) on MgO(0 0 1) by oxygen-plasma-assisted molecular beam epitaxy (OPA-MBE), and have characterized the composition, structure, surface morphology, and magnetic properties by a number of methods. The as-grown OPA-MBE material forms a perfect inverse spinel, in which all Co is in the 2+ formal oxidation state, and occupies octahedral sites within the cation sublattice. The OPA-MBE film surfaces are very flat, with mean roughnesses of only a few {\AA}, and exhibit large, stable magnetic domains. The measured moment per unit volume is 250 emu/cm3, and the saturation magnetization for films in the 1000 {\AA} film thickness range is ∼60% of that of bulk Co ferrite. The material also exhibits strain-dependent magnetic anisotropy that can be understood by considering the various contributions to the total magnetic energy. The overall quality of epitaxial Co ferrite grown on MgO by OPA-MBE is superior in every respect to that obtained using pulsed laser deposition as the growth method.",

keywords = "Cobalt ferrite, Magnetic and structural properties, Molecular beam epitaxy",

author = "Chambers, {S. A.} and Farrow, {R. F.C.} and S. Maat and Toney, {M. F.} and L. Folks and Catalano, {J. G.} and Trainor, {T. P.} and Brown, {G. E.}",

note = "Funding Information: The PNNL portion of the research described in this paper was performed in the Environmental Molecular Sciences Laboratory, a national scientific user facility sponsored by the US Department of Energy's Office of Biological and Environmental Research and located at PNNL. ",

year = "2002",

month = apr,

doi = "10.1016/S0304-8853(02)00039-2",

language = "English (US)",

volume = "246",

pages = "124--139",

journal = "Journal of Magnetism and Magnetic Materials",

issn = "0304-8853",

publisher = "Elsevier B.V.",

number = "1-2",

}

TY - JOUR

T1 - Molecular beam epitaxial growth and properties of CoFe2O4 on MgO(0 0 1)

AU - Chambers, S. A.

AU - Farrow, R. F.C.

AU - Maat, S.

AU - Toney, M. F.

AU - Folks, L.

AU - Catalano, J. G.

AU - Trainor, T. P.

AU - Brown, G. E.

N1 - Funding Information: The PNNL portion of the research described in this paper was performed in the Environmental Molecular Sciences Laboratory, a national scientific user facility sponsored by the US Department of Energy's Office of Biological and Environmental Research and located at PNNL.

PY - 2002/4

Y1 - 2002/4

N2 - We have grown single-crystal Co ferrite (CoFe2O4) on MgO(0 0 1) by oxygen-plasma-assisted molecular beam epitaxy (OPA-MBE), and have characterized the composition, structure, surface morphology, and magnetic properties by a number of methods. The as-grown OPA-MBE material forms a perfect inverse spinel, in which all Co is in the 2+ formal oxidation state, and occupies octahedral sites within the cation sublattice. The OPA-MBE film surfaces are very flat, with mean roughnesses of only a few Å, and exhibit large, stable magnetic domains. The measured moment per unit volume is 250 emu/cm3, and the saturation magnetization for films in the 1000 Å film thickness range is ∼60% of that of bulk Co ferrite. The material also exhibits strain-dependent magnetic anisotropy that can be understood by considering the various contributions to the total magnetic energy. The overall quality of epitaxial Co ferrite grown on MgO by OPA-MBE is superior in every respect to that obtained using pulsed laser deposition as the growth method.

AB - We have grown single-crystal Co ferrite (CoFe2O4) on MgO(0 0 1) by oxygen-plasma-assisted molecular beam epitaxy (OPA-MBE), and have characterized the composition, structure, surface morphology, and magnetic properties by a number of methods. The as-grown OPA-MBE material forms a perfect inverse spinel, in which all Co is in the 2+ formal oxidation state, and occupies octahedral sites within the cation sublattice. The OPA-MBE film surfaces are very flat, with mean roughnesses of only a few Å, and exhibit large, stable magnetic domains. The measured moment per unit volume is 250 emu/cm3, and the saturation magnetization for films in the 1000 Å film thickness range is ∼60% of that of bulk Co ferrite. The material also exhibits strain-dependent magnetic anisotropy that can be understood by considering the various contributions to the total magnetic energy. The overall quality of epitaxial Co ferrite grown on MgO by OPA-MBE is superior in every respect to that obtained using pulsed laser deposition as the growth method.

KW - Cobalt ferrite

KW - Magnetic and structural properties

KW - Molecular beam epitaxy

UR - http://www.scopus.com/inward/record.url?scp=0036531620&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036531620&partnerID=8YFLogxK

U2 - 10.1016/S0304-8853(02)00039-2

DO - 10.1016/S0304-8853(02)00039-2

M3 - Article

AN - SCOPUS:0036531620

SN - 0304-8853

VL - 246

SP - 124

EP - 139

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

IS - 1-2

ER -