Magnetic ordering in amorphous oxides

The magnetic structure of radio frequency sputtered amorphous oxides is investigated by magnetization and ferromagnetic resonance techniques. Samples of Bi/sub 2/O/sub 3/-Fe/sub 2/O/sub 3/ substituted with ABO/sub 3/ (AB=BaTi, PbTi, PbZr) and MeO (M=Cu,Ca,Zn)-type compounds are studied. As-deposited...

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Veröffentlicht in:	IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States) 1993-11, Vol.29 (6), p.3078-3083
Hauptverfasser:	Srinivasan, G., Uma Maheshwar Rao, B., Chen, J.
Format:	Artikel
Sprache:	eng
Schlagworte:	360102 > Metals & Alloys-- Structure & Phase Studies ALKALINE EARTH METAL COMPOUNDS Amorphous magnetic materials Amorphous materials BARIUM COMPOUNDS BARIUM OXIDES BISMUTH COMPOUNDS BISMUTH OXIDES CALCIUM COMPOUNDS CALCIUM OXIDES CHALCOGENIDES Condensed matter: electronic structure, electrical, magnetic, and optical properties COPPER COMPOUNDS COPPER OXIDES CRYSTAL STRUCTURE CRYSTALLIZATION Exact sciences and technology Ferrimagnetic films Ferrimagnetic materials IRON COMPOUNDS IRON OXIDES LEAD COMPOUNDS LEAD OXIDES Magnetic anisotropy Magnetic films MAGNETIC PROPERTIES Magnetic properties and materials Magnetic resonance Magnetization MATERIALS SCIENCE OXIDES OXYGEN COMPOUNDS Perpendicular magnetic anisotropy PHASE TRANSFORMATIONS PHYSICAL PROPERTIES Physics Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source x-ray scattering, etc.) Temperature TITANIUM COMPOUNDS TITANIUM OXIDES TRANSITION ELEMENT COMPOUNDS ZINC COMPOUNDS ZINC OXIDES ZIRCONIUM COMPOUNDS 360104 > Metals & Alloys-- Physical Properties ZIRCONIUM OXIDES
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Zusammenfassung:	The magnetic structure of radio frequency sputtered amorphous oxides is investigated by magnetization and ferromagnetic resonance techniques. Samples of Bi/sub 2/O/sub 3/-Fe/sub 2/O/sub 3/ substituted with ABO/sub 3/ (AB=BaTi, PbTi, PbZr) and MeO (M=Cu,Ca,Zn)-type compounds are studied. As-deposited samples are paramagnetic, and samples annealed at high temperatures show a ferrimagnetic character possibly due to the formation of magnetically ordered clusters. Samples with nonmagnetic ABO/sub 3/ show a record room temperature magnetization. Films containing oxides of zinc, copper, or calcium are anisotropic amorphous magnets with a large uniaxial or planar anisotropy. The nature and composition of ordered clusters in some samples are inferred from magnetic characterization of the film. A similar ferrimagnetic character is observed in amorphous samples sputtered at high temperatures.< >
ISSN:	0018-9464 1941-0069
DOI:	10.1109/20.280893