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BY-NC-ND 3.0 license Open Access Published by De Gruyter June 2, 2014

Surface Magnetic Effects in an Alternating Superlattice

  • Zhi Xu and Xiao-Yu Kuang EMAIL logo

We investigate the surface magnetism of the alternating superlattice with localized spin-1/2. Using

the mean-field approximation method, we discuss not only the correlation between the critical value

j0C of the exchange constant in the surface layer and interlayer exchange constants, but also the connection

between j0C and the bulk exchange constant jA. The calculated results are in good agreement

with the former theoretical calculations. Based on the solutions, we show the relations between the

critical parameter c = JS/JA and the bulk exchange constants as well as the surface transition temperature.

JS is the exchange constant in the first two surface layers. Comparing with the earlier theoretical

works, our results show the effect of the surface modification more gradual.

Received: 2008-5-5
Revised: 2008-12-22
Published Online: 2014-6-2
Published in Print: 2009-11-1

© 1946 – 2014: Verlag der Zeitschrift für Naturforschung

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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