Reversed interface effects in amorphous FeZr/AlZr multilayers
2014 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 90, no 18, 184403- p.Article in journal (Refereed) Published
We report an anomalous enhancement of the critical temperature (T-c) when the thickness (d) of the magnetic layer is decreased from 60 to 20 angstrom in amorphous FeZr/AlZr multilayers. Further reduction of the thickness causes a decrease of T-c, as expected by finite-size scaling, while the magnetic moment decreases monotonically for all values of d. The increase of the critical temperature is attributed to a reversed interface effect where local changes in the nearest-neighbor distance and coordination number gives a higher effective magnetic coupling at the interfaces compared to the interior of the layer. We have successfully described the results within a model where such interface effects are combined with finite-size scaling.
Place, publisher, year, edition, pages
2014. Vol. 90, no 18, 184403- p.
IdentifiersURN: urn:nbn:se:uu:diva-238398DOI: 10.1103/PhysRevB.90.184403ISI: 000344487600002OAI: oai:DiVA.org:uu-238398DiVA: diva2:773711