Phys. Rev. B 65, 014420 (2001) [8 pages]Monte Carlo studies of the magnetic phase diagram of KEr(MoO4)2: A dipolar magnet with strong tetragonal distortionReceived 27 March 2001; published 4 December 2001 The magnetic phase diagram of KEr(MoO4)2 a dipolar magnetic system with strong tetragonal distortion is investigated. The analysis of the experimental results indicates that the dipolar magnet with strong tetragonal distortion in external magnetic field applied along the easy axis resembles the behavior of the S=1/2 two-dimensional Ising model on the rectangular lattice in B‖z with the nearest neighbor interactions only. The Monte Carlo studies of the corresponding critical Bc-Tc line revealed the second order character of the phase transitions down to the critical temperature ≈0.7 K and critical field Bc≈50 mT. The behavior of experimental and numerical data at lower critical temperatures suggests the vicinity of a tricritical point TT characteristic for metamagnets. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.65.014420
DOI:
10.1103/PhysRevB.65.014420
PACS:
75.30.Kz, 75.40.Mg, 75.10.-b
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