Direct synthesis and optimization of rare-earth transition-metal permanent-magnet systems. Final technical report, 1 August 1983-31 July 1986

Technical Report · Mon Sep 15 04:00:00 EDT 1986

OSTI ID:7007253

Cadieu, F J

Special sputtering methods were used to synthesize rare earth-transition metal films such as SmCo/sub 5/, Nd/sub 2/Fe/sub 14/B, and several new compounds in the Sm-Ti-Fe system. Films were synthesized with different crystal textures by varying the sputtering conditions. The magnetic properties observed were found to be strongly dependent on the film texture. For example, SmCo/sub 5/ films with a (200) texture exhibit intrinsic coercive forces, of 8 kOe, while (110) textured films show values of about 18 kOe. For the Nd/sub 2/Fe/sub 1/)3$B compound, films were made that exhibit an easy axis of magnetization either in the film plane or out of the film plane depending upon the crystal texturing of the films. In the film plane-static energy products up to 21 MG-Oe were observed in as-sputtered films without any subsequent heat treatments in certain rare earth-transition metal systems. For films containing only Sm, Ti, and Fe room temperature coercive-force values up to 24 kOe were observed. Films were also made such that the magnetic properties are highly anisotropic in the plane of the film for certain amorphous systems. The incorporation of the coercive-force magnetic films that have been sputter synthesized into several types of micron-scale-device geometries was considered.

• Research Organization: Queens Coll., Flushing, NY (USA). Dept. of Physics
• OSTI ID: 7007253
• Report Number(s): AD-A-172955/7/XAB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
ANISOTROPY
BORON
COBALT
COERCIVE FORCE
CRYSTALS
ELEMENTS
FILMS
IRON
MAGNETIC PROPERTIES
MAGNETS
METALS
NEODYMIUM
PERMANENT MAGNETS
PHYSICAL PROPERTIES
RARE EARTH ALLOYS
RARE EARTHS
SAMARIUM
SEMIMETALS
SPUTTERING
TEXTURE
TITANIUM
TRANSITION ELEMENT ALLOYS
TRANSITION ELEMENTS