Magnetic properties and synthesis of high /sub i/H/sub c/ Sm-Ti-Fe

Journal Article · Mon Nov 14 23:00:00 EST 1988 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.342237· OSTI ID:6749781

Kamprath, N; Liu, N C; Hegde, H; Cadieu, F J

The room-temperature intrinsic coercive force, /sub i/H/sub c/, of the hard Sm-Ti-Fe phase observed in film samples has been measured as a function of composition. The maximum /sub i/H/sub c/ observed at room temperature was 38.5 kOe for a composition Sm/sub 19/Fe/sub 73/Ti/sub 8/. Such samples were first made amorphous and then subsequently crystallized with an in-plane magnetic field, H/sub s/, applied. Tentative tetragonal lattice parameters have been assigned to this phase based on a fitting of 30 x-ray lines between 30/sup 0/ and 80/sup 0/ 2theta for Cu radiation. The fitted tetragonal parameters are a = 8.403 A and c = 12.401 A. This high /sub i/H/sub c/ Sm-Ti-Fe phase has not been observed in films that were directly crystallized onto heated substrates. The ferromagnetic Fe-rich phases in Sm-Ti-Fe samples have been synthesized by rf sputtering films onto heated as well as room-temperature substrates. The samples synthesized onto heated substrates were crystallized directly upon deposition, while the samples deposited onto room-temperature substrates were amorphous and were then subsequently crystallized. An in-the-film-plane magnetic field, H/sub s/, was applied during the deposition as well as during the subsequent crystallization of amorphous film.

• Research Organization: Physics Department, Queens College of CUNY, Flushing, New York 11367
• OSTI ID: 6749781
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 64:10; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
COERCIVE FORCE
FERROMAGNETISM
FILMS
HYSTERESIS
IRON ALLOYS
LATTICE PARAMETERS
MAGNETIC PROPERTIES
MAGNETISM
MAGNETIZATION
MEDIUM TEMPERATURE
PHYSICAL PROPERTIES
RARE EARTH ALLOYS
SAMARIUM ALLOYS
SYNTHESIS
THIN FILMS
TITANIUM ALLOYS