| Numéro |
J. Phys. Colloques
Volume 40, Numéro C2, Mars 1979
International Conference on The Applications of The Mössbauer Effect
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|---|---|---|
| Page(s) | C2-86 - C2-87 | |
| DOI | https://doi.org/10.1051/jphyscol:1979230 | |
J. Phys. Colloques 40 (1979) C2-86-C2-87
DOI: 10.1051/jphyscol:1979230
MÖSSBAUER SPECTRA OF ULTRATHIN Fe FILMS COATED BY MgO
T. Shinjo, S. Hine and T. TakadaInstitute for Chemical Research, Kyoto University, Uji, Kyoto-fu, 611, Japan
Résumé
Les spectres Mössbauer de films minces de fer (24, 16 et 8Å), placés en sandwiches entre des couches de MgO, montrent que le champ hyperfin à 4.2 K augmente quand l'épaisseur des films décroît, pour atteindre un maximum de presque 380 kOe. Pour les films de 8Å d'épaisseur, l'aimantation est préférentiellement orientée perpendiculairement au plan des films.
Abstract
Mössbauer spectra of thin Fe films (24, 16 and 8Å) sandwiched with MgO layers showed that the hyperfine field at 4.2K increased with the decrease of the film thickness. From the computer fitting results with the least square method the hyperfine field at the surface layers of the MgO-coated Fe film is nearly 380 kOe. The spectrum at 4.2K of the 8Å film sandwiched with MgO shows the intensity ratio of 3 : 1 : 1 : 1 : 1 : 3, which means that the magnetization of the 8Å Fe film was preferentially perpendicular to the surface due to the surface anisotropy.