|Title||Magnetic dipole interactions in crystals|
|Publication Type||Journal Article|
|Year of Publication||2016|
|Journal||Physical Review B|
|Type of Article||Article|
|Keywords||anisotropy, demagnetizing factors, ferromagnetism, ground-state, lattice, mnf2, neutron-diffraction, order, system|
1, where a change in sign of the chi anisotropy is found at c/a = 1. Finally, following the early work of Keffer [Phys. Rev. 87, 608 (1952)], the dipolar anisotropy of chi above T-N = 69 K of the prototype collinear Heisenberg-exchange-coupled tetragonal compound MnF2 is calculated and found to be in excellent agreement with experimental single-crystal literature data above 130 K, where the smoothly increasing deviation of the experimental data from the theory on cooling from 130 K to T-N is deduced to arise from dynamic short-range collinear c-axis AFM ordering in this temperature range driven by the exchange interactions.
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