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Epitaxial growth of (111) oriented manganese zinc ferrite thin films and their magnetic properties

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5 Author(s)
Hiratsuka, N. ; Graduate Sch. of Sci. & Eng., Saitama Univ., Urawa, Japan ; Miyazaki, T. ; Kakizaki, K. ; Kwon, O.H.
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Manganese zinc ferrite (MnZn ferrite) thin films were prepared on quartz substrates buffered by a ZnO underlayer by rf magnetron sputtering. The ZnO underlayers exhibited preferentially (001) orientation for any thickness. When Mn-Zn-Fe oxide layers as-deposited on the ZnO underlayers were annealed in reduced atmosphere at 800°C for 5 hours, single-phase spinel type ferrites were formed. The films were preferentially oriented to the [111] direction normal to the film plane. Thin ZnO underlayers successfully induced (111) orientation in plane because of good lattice matching between the ZnO and the spinel phase. Films with a composition of Mn:Zn:Fe=23:9:68 had a saturation magnetization value of 410 emu/cm3. The relationship between the composition and the magnetization for the films was similar to that for the bulk material

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Magnetics, IEEE Transactions on  (Volume:35 ,  Issue: 5 )