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• W2020247269 startingPage "3962" @default.
• W2020247269 abstract "The surface magneto-optic Kerr effect (SMOKE) was used to investigate the magnetic properties of epitaxial thin films of Co, Ni, and their alloys grown on Cu(100) and Cu(111). The Curie temperature ${mathit{T}}_{mathit{C}}$ is higher for the same films of a given thickness on Cu(111) than on Cu(100). All the films show a change in the power-law exponent ensuremath{beta} of the magnetization density Mensuremath{sim}(1-T/${mathit{T}}_{mathit{C}}$${)}^{mathrm{ensuremath{beta}}}$ with reducing film thickness. Ni films on Cu(100) undergo a particularly abrupt crossover at ensuremath{sim}7 monolayers (ML) from three-dimensional Heisenberg (ensuremath{beta}=0.37) to finite-size two-dimensional XY (ensuremath{beta}=0.23) behavior as the film thickness is reduced. The characteristic power-law exponent ensuremath{beta}=0.23 of these films appears to be an experimental realization of Kosterlitz-Thouless behavior over a restricted temperature range. A similar, but more gradual crossover occurs for the Ni films on Cu(111) at 8 to 12 ML. The finite-size scaling behavior in the few-monolayers-thickness range is compared with that reported for Ising thin-film behavior. In all instances ${mathit{T}}_{mathit{C}}$ extrapolates with decreasing thickness to zero at one monolayer. The dimensionality crossover and finite-size scaling behavior is discussed in the light of our current understanding of spin-wave quantization, anisotropy, and film microstructure." @default.
• W2020247269 created "2016-06-24" @default.
• W2020247269 creator A5020661138 @default.
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• W2020247269 date "1994-02-01" @default.
• W2020247269 modified "2023-10-14" @default.
• W2020247269 title "Magnetism in the few-monolayers limit: A surface magneto-optic Kerr-effect study of the magnetic behavior of ultrathin films of Co, Ni, and Co-Ni alloys on Cu(100) and Cu(111)" @default.
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• W2020247269 doi "https://doi.org/10.1103/physrevb.49.3962" @default.
• W2020247269 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/10011291" @default.
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