Phys. Rev. Lett. 85, 5202–5205 (2000)Gd(0001): A Semi-Infinite Three-Dimensional Heisenberg Ferromagnet with Ordinary Surface TransitionReceived 23 May 2000; published in the issue dated 11 December 2000 By comparing the surface and bulk magnetization of smooth, well-ordered Gd samples, we show that the surface has an ordinary transition, i.e., a common Curie temperature for surface and bulk. A quantitative statistical analysis of the temperature dependent magnetization is presented. Critical exponents for both surface, βS = 0.83±0.04, and bulk, βB = 0.376±0.015, are consistent with the semi-infinite three-dimensional Heisenberg model with homogeneous exchange. © 2000 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.85.5202
DOI:
10.1103/PhysRevLett.85.5202
PACS:
75.30.Pd, 75.70.Ak
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