Magnetic interactions in antiferromagnetic DyPO4(Zeeman spectra)
- 9 December 1971
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 4 (17) , 2937-2944
- https://doi.org/10.1088/0022-3719/4/17/024
Abstract
Dysprosium phosphate (DyPO4) orders antiferromagnetically at a Neel temperature of 3.4 K; the direction of the sublattice alignment is the c axis of the tetragonal unit cell. This ordered state arises from a combination of dipolar and exchange interaction and is well described by the Ising model for a highly anisotropic system of magnetic ions with ground state g values of gc=19.5 ga=ga' approximately=0. Analysis of the high field Zeeman spectra below 20 K on the transition Z1(6H152/) to G1, which displays a pronounced quintet structure, enables an evaluation of the strength of the exchange interaction to be made. The result is confirmed by a direct determination of the interaction field from high field moment measurements at 0.5 K.Keywords
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