Numéro
J. Phys. IV France
Volume 02, Numéro C3, Décembre 1992
35 ème Colloque de Métallurgie de l'INSTN
MATERIAUX MAGNETIQUES
PROGRES ET PERSPECTIVES
Page(s) C3-199 - C3-203
DOI http://dx.doi.org/10.1051/jp4:1992329
35 ème Colloque de Métallurgie de l'INSTN
MATERIAUX MAGNETIQUES
PROGRES ET PERSPECTIVES

J. Phys. IV France 02 (1992) C3-199-C3-203

DOI: 10.1051/jp4:1992329

Mise en évidence d'un état magnétique non colinéaire dans les multicouches Fe/Gd

Ph. BAUER, M. SAJIEDDINE, B. GEORGE, M. VAEZZADEH, C. DUFOUR, K. CHERIFI, G. MARCHAL and Ph. MANGIN

Laboratoire de Physique du Solide, BP. 239, 54506 Vandoeuvre cedex, France


Abstract
In the Fe/Gd multilayered system the magnetic moments are constrained to be in the film plane owing to dominant shape anisotropy, provided the absence of crystal field effects upon the S state of Gd3+. The in-plane magnetic structure versus an external field applied parallel to the plane is studied through magnetization, magnetoresistance measurements and 57Fe Mössbauer spectroscopy. The transition from the "aligned state" to a "twisted state" is evidenced at a critical H* field for a Fe(42 Å)/Gd(84 Å) sample. It turns out that H* depends upon temperature and respective Fe-Gd submagnetizations. The "twisted state" is favoured at the compensation temperature.



© EDP Sciences 1992