Effects of substrate on the magnetic properties of epitaxial TbFe/sub 2/(111) films

The effects of substrate on the strains of epitaxial TbFe/sub 2/(111) films, and consequently on the magnetization orientation, have been studied. Thermal strain from differential thermal contraction between substrates and the TbFe/sub 2/ films is considered to be the dominant factor in determining...

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Bibliographic Details
Published inIEEE transactions on magnetics Vol. 32; no. 5; pp. 4752 - 4754
Main Authors Wang, C.-T., Clemens, B.M., White, R.L.
Format Journal Article
LanguageEnglish
Published IEEE 01.09.1996
Subjects
Buffer layers
Magnetic field induced strain
Magnetic films
Magnetic materials
Magnetic properties
Magnetization
Magnetostriction
Substrates
Temperature
Tensile strain
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Summary:The effects of substrate on the strains of epitaxial TbFe/sub 2/(111) films, and consequently on the magnetization orientation, have been studied. Thermal strain from differential thermal contraction between substrates and the TbFe/sub 2/ films is considered to be the dominant factor in determining the film strain. Therefore, Al/sub 2/O/sub 3/(112~0), MgO(111), and CaF/sub 2/(111) substrates with an epitaxial W(110) buffer layer have been used to grow the TbFe/sub 2/ films. The magnetisation of the TbFe/sub 2/ films on the Al/sub 2/O/sub 3/ and MgO substrates with a tensile thermal strain is in the film plane, but that on the CaF/sub 2/ substrate with a compressive thermal strain is in the out-of-plane direction. An unknown soft magnetic material has been found at the interfacial region of the TbFe/sub 2/ film and the W buffer layer.
ISSN:0018-9464
1941-0069
DOI:10.1109/20.539140