Ferromagnetic behavior of disordered MnPt films produced by rf sputtering

Conference · Sat Jan 01 00:00:00 EST 1977

DOI:https://doi.org/10.1063/1.324891· OSTI ID:5349816

Severin, C S; Chen, C W

The state of atomic order and the variation of magnetic behavior with atomic order in MnPt are studied. X-ray and neutron diffraction experiments show that quenching still results in appreciable degrees (greater than 0.8) of order and only through sputtering can completely disordered MnPt be prepared. Magnetization measurements conducted on the quenched powder and on the sputtered films established ferromagnetism in the disordered MnPt. The deduced magnetic moment is 3.25 +- 0.30 ..mu../sub B/ per Mn atom in the sputtered films at 0/sup 0/K. This value is compared with those deduced for Mn in other alloys. The difficulties in invoking the Bethe-Slater criterion or a segregation of constituent atoms to explain the onset of ferromagnetism in the disordered MnPt are discussed.

• Research Organization: Ames Lab., Ames, IA (United States)
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 5349816
• Report Number(s): IS-M-119; CONF-771127-5
• Resource Relation: Journal Volume: 49; Journal Issue: 3; Conference: 23. conference on magnetism and magnetic materials, Minneapolis, MN, USA, 8 Nov 1977
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
FILMS
MAGNETIC PROPERTIES
MANGANESE ALLOYS
PLATINUM ALLOYS
FERROMAGNETISM
NEUTRON DIFFRACTION
ORDER-DISORDER TRANSFORMATIONS
X-RAY DIFFRACTION
ALLOYS
COHERENT SCATTERING
DIFFRACTION
MAGNETISM
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
PLATINUM METAL ALLOYS
SCATTERING
360104* - Metals & Alloys- Physical Properties