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- W2024486009 abstract "The spin-1 ferromagnetic Blume-Capel film with an alternating crystal field $ensuremath{Delta}={ensuremath{Delta}}_{1}$ on the odd layers and $ensuremath{Delta}={ensuremath{Delta}}_{2}$ on the even ones is considered in the mean-field approximation. The ground-state phase diagrams in the ${(d}_{1}{,d}_{2})$ plane ${(d}_{1}={ensuremath{Delta}}_{1}/J$ and ${d}_{2}={ensuremath{Delta}}_{2}/J)$ are determined analytically; the number of their phases depends on the parity of the number of layers of the film. At finite temperature, 15 types of topology, depending on the range of variation of ${d}_{1},$ are found in the ${(t,d}_{2})$ plane for an even number of layers, but only 14 for an odd number of layers ${(t=k}_{B}T/J$ is the reduced temperature). The phase diagrams exhibit a variety of multicritical points. In particular, a tricritical point C appears in the paramagnetic-ferromagnetic line of transition, but only for values of ${d}_{1}$ larger than a threshold value ${d}_{mathrm{trc}}^{(2)}$ which is but the tricritical crystal field (in the mean-field approximation) of the spin-1 Blume-Capel model on a square lattice. Moreover, lines of transition presenting the reentrant and double reentrant behaviors may also take place." @default.
- W2024486009 created "2016-06-24" @default.
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- W2024486009 date "2004-02-18" @default.
- W2024486009 modified "2023-09-25" @default.
- W2024486009 title "Phase diagrams of the spin-1 Blume-Capel film with an alternating crystal field" @default.
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- W2024486009 doi "https://doi.org/10.1103/physrevb.69.064415" @default.
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