1998/04/18 by Malte Henkel, Stéphane Andrieu, Philippe Bauer +1 · 2 citations
Physics and Astronomy · #Magnetic properties of thin films #Physics of Superconductivity and Magnetism #Theoretical and Computational Physics #cond-mat.mtrl-sci #cond-mat.stat-mech #hep-lat
paper · pdf · doi:10.1103/physrevlett.80.4783
published as Phys. Rev. Lett. 80, 4783-4786 (1998) · Latex, 4 pages, with 2 figures, to appear in Phys. Rev. Lett.
arxiv created 1998/04/18 · openalex publication_date 1998/05/25 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The critical temperature of thin Fe layers on Ir(100) is measured through M"ossbauer spectroscopy as a function of the layer thickness. From a phenomenological finite-size scaling analysis, we find an effective shift exponent \ensuremathλ\phantom\rule0ex0ex=\phantom\rule0ex0ex3.15\ifmmode±\else\textpm\fi0.15, which is twice as large as the value expected from the conventional finite-size scaling prediction \ensuremathλ\phantom\rule0ex0ex=\phantom\rule0ex0ex1/\ensuremathν, where \ensuremathν is the correlation length critical exponent. Taking corrections to finite-size scaling into account, we derive the effective shift exponent \ensuremathλ\phantom\rule0ex0ex=\phantom\rule0ex0ex(1+2\ensuremathΔ1)/\ensuremathν, where \ensuremathΔ1 describes the leading corrections to scaling. For the 3D Heisenberg universality class, this leads to \ensuremathλ\phantom\rule0ex0ex=\phantom\rule0ex0ex3.0\ifmmode±\else\textpm\fi0.1, in agreement with the experimental data. Earlier data by Ambrose and Chien on the effective shift exponent in CoO films are also explained.