Volume 47, Number 5, September I 1999
|Page(s)||556 - 561|
|Section||Atomic and molecular physics|
|Published online||01 September 2002|
Magnetic trimer on non-magnetic substrate: From frustration towards non-collinearity
St. Petersburg State University - 14 line V.O., 29, 199178, St. Petersburg, Russia
2 Institut de Physique et Chimie des Matériaux de Strasburg, GEMM 23 rue du Loess, F-67037 Strasbourg, France
Accepted: 5 July 1999
We present the very first non-collinear magnetic structure calculations of supported metallic 3d triangular trimers. Within the vector Anderson model, in dependence on the ratio between hopping parameters in the trimer the ground state can be collinear or non-collinear. Calculations performed for the Cr and Fe trimers show that the modulus of the magnetic moments per atom are enhanced relatively to bulk value. The dependence, vs. hopping integrals, of the angles between the magnetic moments is different when going from Cr to Fe although these angles are equal to 120 degrees in the ground state of the equilateral triangle.
PACS: 36.40.Cg – Electronic and magnetic properties of clusters / 71.24.+q – Electronic structure of clusters and nanoparticles / 75.30.Pd – Surface magnetism
© EDP Sciences, 1999
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