Abstract
We report a temperature-dependent x-ray diffraction study of critical behavior of sublattice order in thin epitaxial FeCo(001) films grown on MgO(001). The quantitative analysis of the diffraction profiles reveals a crossover phenomenon between strong-field and weak-field critical adsorption which occurs at a reduced temperature t1=1.3×10−3. We demonstrate that this scenario gives a first experimental access to the universal critical exponent η⊥ which governs the spatial decay of critical fluctuations perpendicular to the surface. We find η⊥=0.86(5).
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.