35 ème Colloque de Métallurgie de l'INSTN
MATERIAUX MAGNETIQUES
PROGRES ET PERSPECTIVES

J. Phys. IV France 02 (1992) C3-205-C3-209
DOI: 10.1051/jp4:1992330

Structure et magnétisme de super-réseaux Ru/Mn et MnFeMn/Ru préparés par MBE

V. DUPUIS¹, M. PIECUCH², J.F. BOBO², F. BAUDELET³, A. FONTAINE⁴ and J.Ph. BAUER<sup>3

1</sup>  Université C. Bernard Lyon I, Département Physique des Matériaux, 43 bd du 11 Novembre, 69622 Villeurbanne, France
²  Laboratoire Mixte, CNRS-Saint Gobain, CRPAM, BP. 109, 54704 Pont-à-Mousson, France
³  Université de Nancy I, Laboratoire de Physique des Solides, BP. 239, 54506 Vandoeuvre-lés-Nancy, France
⁴  LURE, CNRS, CEA, MENJS, Bt 209d, 91405 Orsay, France

Abstract
Our recent works on Fe/Ru superlattices revealed a new hexagonal structure , a reduced magnetic moment (1.7 µB) for the Fe inner layers, and two magnetic dead layers at the interface. Then we decided to insert just one plane of manganese between Fe and Ru to test the interface influence on the structural and magnetic properties in these superlattices. In this paper, we present results obtained from X-ray diffraction and absorption and from macroscopic magnetization and Mössbauer spectroscopy on MnFeMn/Ru superlattices. The Mn environment identical to that of Fe, is quantitatively described. We show that there is no solid solution at the Fe/Ru interface ; thus the four Fe magnetic dead layers do not originate in interface alloying. For the inner Fe layers, we obtain the same reduced magnetic moment as in Fe/Ru superlattices and a few tenth of µB for Mn atoms. Finally we confirm once more the quality of the interfaces in these superlattices.

© EDP Sciences 1992