Thermal stability and the origin of perpendicular anisotropy in amorphous Tb-Fe-Co films

Journal Article · Mon Jan 01 04:00:00 EST 1990 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.41.651· OSTI ID:7035387

Wang, Y J; Leng, Q W ^[1]

---

1. Institute of Physics, Chinese Academy of Sciences, Beijing 100080, People's Republic of China (CN)

Both the thermal stability of the material parameters and the effect of annealing on magnetic anisotropy have been investigated for amorphous Tb{sub 27}Fe{sub 53}Co{sub 20} films. On the basis of the coexistence of the pseudodipolar interaction and the stress coupled with magnetostriction, a numerical computation is performed on fitting the change of the perpendicular anisotropy {ital K}{sub {ital u}} with temperature and {ital K}{sub {ital u}} variations affected by annealing at the various temperatures, respectively. We show that the anisotropy originates from both the internal stress and the pseudodipolar interaction with the anisotropic part of the Ruderman-Kittel-Kasuya-Yosida exchange interaction, in which a contribution from Tb-Fe atom pairs is dominant. The change of the material parameters occurs after relatively short annealing. We attribute it to the thermal relaxation of internal stress at lower temperatures.

• OSTI ID: 7035387
• Journal Information: Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 41:1; ISSN 0163-1829; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
ANISOTROPY
COBALT ALLOYS
FILMS
IRON ALLOYS
MAGNETIC PROPERTIES
MAGNETOSTRICTION
PHYSICAL PROPERTIES
RARE EARTH ALLOYS
TEMPERATURE EFFECTS
TERBIUM ALLOYS
THIN FILMS