Local and long-range realizations of a spin-reorientation surface phase transition
| Autor: | G. He, H. Winch, David Venus, R. Belanger, P. H. Nguyen |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Mesoscopic physics
Condensed Matter - Materials Science Materials science Condensed matter physics Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Magnetic susceptibility Condensed Matter::Materials Science Magnetization Dipole Metastability 0103 physical sciences Monolayer 010306 general physics 0210 nano-technology Spin (physics) Anisotropy |
| DOI: | 10.48550/arxiv.1610.06446 |
| Popis: | The spin reorientation transition of an ultrathin film from perpendicular to in-plane magnetization is driven by a competition between dipole and anisotropy energies. \textit{In situ} measurements of the magnetic susceptibility of Fe/2 ML Ni/W(110) films as a function of Fe coverage, made as the films are deposited at constant temperature, show two clear peaks; one at the long-range and one at the local realization of the transition. In the long-range realization, the susceptibility probes the striped domain pattern that is formed in response to the balance of energetics on a mesoscopic scale. Here the reorientation transition occurs at a non-integer layer thickness. In the local realization, the susceptibility probes the response of small islands with in-plane anisotropy in the 3rd atomic Fe layer that are grown on the 2nd atomic Fe layer, which has perpendicular anisotropy. It is a response to the local finite-size, metastable energetics due to discrete steps in thickness. An excellent quantitative description of the susceptibility data is obtained when both local and long-range aspects of the spin reorientation transition are included. Comment: 9 pages, 5 figures |
| Databáze: | OpenAIRE |
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