Annealing Effect of Equiatomic Co/Pt Alloy Films

• Authors: R. Gontarz , T. Luciński , L. Uba , S. Uba , Yu. Kudryavtsev
• Languages of publication: EN

Abstracts

EN

Polycrystalline as-sputtered CoPt alloy films near the equiatomic composition were characterized as consisting of a disordered fcc phase with preferred texture along [111] orientation perpendicular to the film plane. The film annealing at 600°C/16 h induces the disorder-order phase transition confirmed by X-ray diffraction. As a result of the transition an appearance of the ordered tetragonal (fct) phase of AuCuI type with c/a = 0.974 is observed. The c-axis is the easy axis of magnetization. Both longitudinal and polar Kerr hysteresis loops reveal a dramatic increase in the coercivity from 0.1 to 4.5 kOe in annealed CoPt alloy films due to ordering.

Keywords

EN

81.40.Ef; 75.70.Fr; 61.50.Ks

Discipline

• 81.40.Ef: Cold working, work hardening; annealing, post-deformation annealing, quenching, tempering recovery, and crystallization
• 61.50.Ks: Crystallographic aspects of phase transformations; pressure effects(see also 81.30.Hd in materials science)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1994
• Volume: 85
• Issue: 2
• Pages: 427-431

Dates

published

1994-02

Contributors

author

R. Gontarz

• Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland

author

T. Luciński

• Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland

author

L. Uba

• Institute of Physics, Warsaw University Branch in Białystok, Lipowa 41, 15-424 Białystok, Poland

author

S. Uba

• Institute of Physics, Warsaw University Branch in Białystok, Lipowa 41, 15-424 Białystok, Poland

author

Yu. Kudryavtsev

• Institute of Metal Physics Ukr. AS, 36 Vernadsky st., 252142 Kiev, Ukraine

Identifiers

DOI

10.12693/APhysPolA.85.427