Magnetic properties of Fe-base amorphous ultrafine particles

Magnetic properties of Fe-base amorphous ultrafine particles

Sputter-etching an appropriate polymer substrate produces a densely-packed array of needlelike projections on the polymer surface. Rf sputter deposition of Fe 80 B 20 onto this surface produces an array of elongated finger-like projections of amorphous magnetic material, with diameters well under 1...

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Veröffentlicht in:IEEE transactions on magnetics 1985-09, Vol.21 (5), p.2038-2043
Hauptverfasser: Ohnuma, S., Nakanouchi, Y., Graham, C., Masumoto, T.
Format: Artikel
Sprache:eng
Schlagworte:
Amorphous magnetic materials
Amorphous materials
Argon
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Cross-disciplinary physics: materials science
rheology
Domain effects, magnetization curves, and hysteresis
Exact sciences and technology
Magnetic materials
Magnetic properties
Magnetic properties and materials
Materials science
Metals, semimetals and alloys
Other topics in magnetic properties and materials
Physics
Polymer films
Powders
Specific materials
Sputtering
Substrates
Surface morphology
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Beschreibung
Zusammenfassung:Sputter-etching an appropriate polymer substrate produces a densely-packed array of needlelike projections on the polymer surface. Rf sputter deposition of Fe 80 B 20 onto this surface produces an array of elongated finger-like projections of amorphous magnetic material, with diameters well under 1 μm and aspect ratios of 5 or more. These finger-like projections meet the definition of ultra-fine particles(UFP). Planar samples prepared in this way have a magnetic easy axis perpendicular to the sample surface with K u /2πM s 2 =0.1-0.2, and have coercive fields up to 400 Oe. The dependence of magnetic properties on the sample morphology is described and discussed. Possible applications are briefly mentioned.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.1985.1064020