Influence of boundaries on magnetic ordering in Fe/V superlattices
2010 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 81, no 21, 214429- p.Article in journal (Refereed) Published
We study the role of surface boundaries on the magnetic properties of [Fe/V](n) superlattice structures, with n=2-10. Using the magneto-optical Kerr effect and polarized neutron reflectivity measurements, we examine the evolution of both the total and the layer-resolved magnetizations as a function of temperature. By varying n, we observe a large shift in the transition temperatures T-c and a substantial change in the total magnetization critical exponent beta. In particular, the thicker samples exhibit nonuniversal exponent values. By resolving the magnetization as a function of position within the superlattice, we show that this behavior arises from contributions of the surfaces. Furthermore, we attribute the large shift in T-c to long-ranged interactions present in the superlattice.
Place, publisher, year, edition, pages
2010. Vol. 81, no 21, 214429- p.
IdentifiersURN: urn:nbn:se:uu:diva-136258DOI: 10.1103/PhysRevB.81.214429ISI: 000278936900004OAI: oai:DiVA.org:uu-136258DiVA: diva2:376586