E. Des, C. Sur-le-magnétismemagn´magnétisme-des-barri-`-eresbarri-`-barri-`-eres, D. Tunnel, and . Sur, (001) présentent toujours une densité importante d'APBs. Peut-? etre en est-il autrement pour nos

. Nm, Cela correspondàcorrespondà une variation de 2.5% par rapportàrapportà la valeur théorique pour CoFe 2 O 4 , etàetà une déformation hors plan de 6

. Ainsi, nos films ultraminces de CoFe 2 O 4 (001) déposés sur MgAl 2 O 4 (001) semblent subir une compression dans le plan

E. Des and C. Cofe, (a) Image HRTEM obtenue en section transverse sur un film

E. Des, C. Substrat, and . Figure, 12 ? (a) Image HRTEM obtenue en section transverse sur un film MgAl 2 O 4 nm) Les cercles indiquent la position des dislocations et les traits pointillés mettent enévidenceenévidence une paroi d'antiphase, Analyses GPA et profils associés pour les déformations dans le plan ? xx (b) et hors plan ? yy (c). Le champ de déformations induit localement par les dislocations est clairement visible

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