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Multicritical behavior in the antiferromagnetic Blume–Capel model : 35th annual conference on magnetism and magnetic materials (1991)

Wang, Yung-Li ; Kimel, J. D.

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 69 (1991), S. 6176-6178

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ISSN: 1089-7550

Source: AIP Digital Archive

Topics: Physics

Notes: The existence of the fourth-order critical point has been found in the spin-1 Ising antiferromagnet with a single-ion potential and an external magnetic field involved by using the mean-field approximation calculation. The Monte Carlo simulation gives more accurate results and shows that no such phase transition occurs in the square lattice system. To show definitely that the fourth-order phase transition appears in three-dimensional systems, the simple cubic system is investigated by using Monte Carlo simulations. It was found that the decomposition of the tricritical point into a critical end point and a double critical end point appears in the phase diagram within a small range of the single-ion potential parameter. The location of the fourth-order critical point can also be estimated.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.348797

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