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- W3025103934 abstract "Abstract The phase diagram of a face-centred cubic (FCC) antiferromagnet is calculated from the effective field theory (EFT) of Honmura and Kaneyoshi taking into account not only the effect of interaction with nearest neighbours, J 1 , but also the effect of second neighbours, J 2 . The phase diagram for the nearest neighbour case away from the triple point, which in our calculations is predicted to be at H = 4 and T = 0, is close to cluster variation method (CVM) and Monte Carlo (MC) results. Similar to MC and CVM predictions, we observe that the increasing second neighbours interaction pushes the triple point towards zero field. Our calculations also show that for α = − J 2 / J 1 = 0.3, the triple point merges with the transition point of the L1 0 phase, one of the ground states, at H = 0 and changes the nature of phase transition from first- to second-order, in full agreement with Monte Carlo predictions. The phase diagram with the effect of second neighbours calculated for several values of α are in good agreement with available MC and CVM predictions." @default.
- W3025103934 created "2020-05-21" @default.
- W3025103934 creator A5034042137 @default.
- W3025103934 creator A5091740143 @default.
- W3025103934 date "2020-06-19" @default.
- W3025103934 modified "2023-09-25" @default.
- W3025103934 title "Phase diagram of the frustrated FCC antiferromagnet from effective-field theory" @default.
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- W3025103934 doi "https://doi.org/10.1088/1361-648x/ab9346" @default.
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