HUGE MAGNETOVOLUME EFFECT IN AN INVERTED MnLAYER ON Ag(001) STUDIED BY LEED

P. Schieffer, C. Krembel, M.-C. Hanf, G. Gewinner and Y. Gauthier
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P. Schieffer: Laboratoire de Physique et de Spectroscopie Electronique (UMR CNRS 7014), Faculté des Sciences et Techniques, 4 rue des Frères Lumière, F-68093 Mulhouse Cedex, France
C. Krembel: Laboratoire de Physique et de Spectroscopie Electronique (UMR CNRS 7014), Faculté des Sciences et Techniques, 4 rue des Frères Lumière, F-68093 Mulhouse Cedex, France
M.-C. Hanf: Laboratoire de Physique et de Spectroscopie Electronique (UMR CNRS 7014), Faculté des Sciences et Techniques, 4 rue des Frères Lumière, F-68093 Mulhouse Cedex, France
G. Gewinner: Laboratoire de Physique et de Spectroscopie Electronique (UMR CNRS 7014), Faculté des Sciences et Techniques, 4 rue des Frères Lumière, F-68093 Mulhouse Cedex, France
Y. Gauthier: Laboratoire de Cristallographie, CNRS, Boite Postale 166, F-38042 Grenoble Cedex, France

Surface Review and Letters (SRL), 2002, vol. 09, issue 03n04, 1431-1436

Abstract: The surface structure obtained by deposition of a Ag monolayer on the ideal c(2 × 2) antiferromagnetic Mn monolayer on Ag(001) at 100 K and subsequent annealing at room temperature is determined by low energy electron diffraction. It is established that this system is actually a good realization of an inverted monolayer, i.e. a pseudomorphic Ag/Mn/Ag(001) structure that corresponds to a reversed composition of the two topmost layers with respect to the Mn overlayer. The Ag–Mn and Mn–Ag interlayer distances,d12= 1.97 ± 0.015Å andd23= 1.97 ± 0.02Å respectively, indicate only a fairly small contraction of ~ 3.5% (~ 1.5%) with respect to the ideal Ag bulk lattice (Mn monolayer on top) as compared to ~ 10% expected from atomic radii in bulk Mn and Ag. This clearly reveals a spectacular magnetovolume effect related to the high spin state of Mn in this two-dimensional structure.

Keywords: Low energy electron diffraction; surface; Mn; Ag(001) monolayer; magnetovolume effect (search for similar items in EconPapers)
Date: 2002
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DOI: 10.1142/S0218625X02004013

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