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- W2014893904 abstract "The model of a dipole-dipole magnet previously developed1,2 has applied to a KEr(MoO4)2 crystal with two paramagnetic ions in an orthorhombic unit cell. The erbium ion in the compound has a large anisotropy of an effective g tensor which, in turn, leads to Ising-like behavior in the magnetic subsystem. As had been done earlier,2 we had calculated the dipole configuration with the lowest energy, thus obtaining the ground-state structure that would appear at the magnetic phase transition. This dipole structure consists of ferromagnetic chains aligned along the c axis and antiferromagnetically coupled along a and b axes. The results were compared with recently done measurements of magnetic moment and low-temperature magnetic susceptibility.3 Calculated dipole ground energy E min=−1.325 K is in reasonable agreement with the experimental value of Tn=0.9 K. The obtained easy-axis direction along the c axis also agreed with experiment. The phase transition observed in crystal at H∥c in our model results in a transition to a ferromagnetic structure with Hcr=700 Oe. The last agreed with measured Hcr=800 Oe so one should conclude that a pure dipole model could well describe the main features of KEr(MoO4)2. At the same time our model could not explain the other phase transition that took place at H=1.5 kOe(H∥a). To understand this transition one probably should also consider a small anisotropic exchange interaction." @default.
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- W2014893904 date "1994-05-15" @default.
- W2014893904 modified "2023-10-14" @default.
- W2014893904 title "Dipole-dipole interactions in KEr(MoO4)2 (abstract)" @default.
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- W2014893904 doi "https://doi.org/10.1063/1.356670" @default.
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