Molecular beam epitaxial growth and properties of CoFe2O4 on MgO(001)

被引：131

作者：

Chambers, SA

Farrow, RFC

Maat, S

Toney, MF

Folks, L

Catalano, JG

Trainor, TP

Brown, GE

机构：

[1] Pacific NW Natl Lab, Fundamental Sci Div, Richland, WA 99352 USA

[2] IBM Corp, Almaden Res Ctr, San Jose, CA USA

[3] Stanford Univ, Dept Environm & Geol Sci, Stanford, CA 94305 USA

[4] Stanford Univ, Stanford Synchrotron Radiat Lab, Stanford, CA 94305 USA

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2002年 / 246卷 / 1-2期

关键词：

cobalt ferrite; molecular beam epitaxy; magnetic and structural properties;

D O I：

10.1016/S0304-8853(02)00039-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have grown single-crystal Co ferrite (CoFe2O4) on MgO(001) 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 Angstrom, and exhibit large, stable magnetic domains. The measured moment per unit volume is 250 emu/cm(3), and the saturation magnetization for films in the 1000Angstrom film thickness range is similar to60% 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. (C) 2002 Published by Elsevier Science B.V.

引用

页码：124 / 139

页数：16

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