Influence of boundaries on magnetic ordering in Fe/V superlattices

被引：9

作者：

Ahlberg, Martina ^{[1
]}

Marcellini, Moreno ^{[1
]}

Taroni, Andrea ^{[1
]}

Andersson, Gabriella ^{[1
]}

Wolff, Maximilian ^{[1
]}

Hjorvarsson, Bjorgvin ^{[1
]}

机构：

[1] Uppsala Univ, Dept Phys & Astron, SE-75120 Uppsala, Sweden

来源：

PHYSICAL REVIEW B | 2010年 / 81卷 / 21期

关键词：

FINITE-SIZE; PHASE-TRANSITIONS; CRITICAL-BEHAVIOR; LAYER THICKNESS; THIN-FILMS; XY-MODEL; EXCHANGE; MULTILAYERS; SURFACE; OSCILLATIONS;

D O I：

10.1103/PhysRevB.81.214429

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页数：7

共 46 条

[1] Polarized neutron reflectometry studies of depth magnetization distribution in Fe/V layered structure [J].