Neutron and Mössbauer Studies of the Planar Antiferromagnet KFeF4 in the Critical Region
- 1 September 1972
- journal article
- research article
- Published by Wiley in Physica Status Solidi (b)
- Vol. 53 (1) , 227-234
- https://doi.org/10.1002/pssb.2220530124
Abstract
Results obtained from diffuse neutron scattering investigations and those derived from magnetic Bragg peaks on single crystals of the planar antiferromagnet KFeF4 in the critical region reveal that the temperature dependence of the two‐dimensional short range magnetic order and of the sublattice magnetization follow (T – TN)−νv and (1 – T/TN)β laws, respectively, where v = 0.60, β = 0.20, and TN = 148 K. Mössbauer measurements at 300K showed that for KFeF4 the isomer shift is (+ 0.138 ± 0.002) mm/s see page 232. and the quadrupole splitting is (1.460 ± 0.005) mm/s see page 232. . In the temperature range 0.96 < T/TN < 0.998 the internal magnetic field follows the power law Hin(T) = H(0) D (1 – T/TN)β, where H(0) = H (4.2 K) = (540 ± 4) kOe, TN = (141.51 ± 0.05) K, D = 1.12 ± 0.03, and β = 0.209 ± 0.008.Keywords
This publication has 5 references indexed in Scilit:
- Critical Magnetic Scattering inNiPhysical Review B, 1971
- Crystal structure and magnetic properties of the two-dimensional antiferromagnet KFeF4Solid State Communications, 1971
- Neutron Scattering Investigation of Phase Transitions and Magnetic Correlations in the Two-Dimensional Antiferromagnets Ni, Mn, FePhysical Review B, 1970
- Mössbauer spectrum shift depending on the degree of spin‐system orderingPhysica Status Solidi (b), 1968
- Hartree–Fock atomic scattering factors for the iron transition seriesActa Crystallographica, 1961