| Autor: |
D. J. Roberts, Jürgen Fassbender, Gernot Güntherodt, Burkard Hillebrands, R. M. Jungblut, Gillian A. Gehring |
| Rok vydání: |
1996 |
| Předmět: |
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| Zdroj: |
Physical review. B, Condensed matter. 53(16) |
| ISSN: |
0163-1829 |
| Popis: |
We report on an unexpected suppression of the magnetocrystalline anisotropy contribution in epitaxial fcc Co(110) films on Cu(110) below a thickness of dc=(50 +/- 10) A. For film thicknesses larger than dc the measured anisotropy value agrees with published data. Measurements on films with reduced strain indicate a large strain dependence of dc . A model calculation based on a crystal-field formalism and discussed within the context of band theory, which explicitly takes tetragonal misfit strains into account, reproduces the experimen-tally observed anomalies. Our results indicate that the usually applied phenomenological description of anisotropies, assuming additive free energy terms for each anisotropy contribution, fails in this case. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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