Thermal conductivity of amorphous rare earth—transition metal thin films for magneto-optic recording
| Autor: | S.D. Jacobs, L.J. Shaw-Klein, Stephen J. Burns, John C. Lambropoulos, T.K. Hatwar |
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| Rok vydání: | 1992 |
| Předmět: |
Materials science
Condensed matter physics Film plane Metals and Alloys Mineralogy Surfaces and Interfaces Coercivity Microstructure Surfaces Coatings and Films Electronic Optical and Magnetic Materials Amorphous solid Thermal conductivity Electrical resistivity and conductivity Materials Chemistry Thin film Anisotropy |
| Zdroj: | Thin Solid Films. 216:181-183 |
| ISSN: | 0040-6090 |
| DOI: | 10.1016/0040-6090(92)90891-e |
| Popis: | The thermal conductivity of a magneto-optic recording layer of sputtered amorphous TbFeCoZr is measured, and the results correlated with the thin film microstructure. Thermal conductivity K⊥ perpendicular to the plane of the film is measured using a thermal comparator method, while thermal conductivity K‖ parallel to the plane of the film is calculated from electrical conductivity using the Wiedemann-Franz conversion. K⊥ ∼ 7 W mK−1 for non-columnar dense films, while K‖ ∼ 4 W mK−. For columnar, less dense films sputtered at higher pressures, K⊥ ∼ 4 W mK−1, while K‖ ∼ 0.3 W mK−1. The lowering of K⊥ is probably due to the decrease in density, while the strong anisotropy in the thermal conductivity of the columnar material is due to the introduction of intercolumnar contacts perpendicular to the film plane. Magnetic coercivity also drops with increasing deposition pressure, owing in part to the introduction of voids and defects into the film. |
| Databáze: | OpenAIRE |
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