Measurement of the critical exponent β by means of optical birefringence on the Heisenberg antiferromagnet RbMnF3
- 30 August 1981
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 14 (24), L737-L740
- https://doi.org/10.1088/0022-3719/14/24/004
Abstract
The critical exponent beta for the ideal Heisenberg antiferromagnet RbMnF3 was measured by means of optical birefringence. To this end a small part (12%) of Mn2+ ions were substituted by Fe2+ ions. In the critical region 10-4c-T)/Tc-2, beta was determined to be 0.385+or-0.01, in good agreement with the theoretical prediction beta th=0.38+or-0.03. Together with the experimental values for other critical exponents, this value of beta confirms the scaling laws. In a magnetic field up to 1 T, perpendicular to one of the easy axes, no change in the value of beta was observed.Keywords
This publication has 9 references indexed in Scilit:
- On the observation of critical indices of primary and secondary order parameters using birefringenceJournal of Physics C: Solid State Physics, 1977
- Modulated polarization measurement of structural phase transitions in KMnF3Review of Scientific Instruments, 1976
- Bicritical and tetracritical points in anisotropic antiferromagnetic systemsPhysical Review B, 1976
- Birefringence of light in magnetically ordered crystalsSoviet Physics Uspekhi, 1975
- The renormalization group in the theory of critical behaviorReviews of Modern Physics, 1974
- Experiments on simple magnetic model systemsAdvances in Physics, 1974
- Heat Capacity of RbMnnear the Antiferromagnetic Transition TemperaturePhysical Review B, 1973
- Quantitative Analysis of Inelastic Scattering in Two-Crystal and Three-Crystal Neutron Spectrometry; Critical Scattering from RbMnPhysical Review B, 1971
- Equilibrium Spin Configuration and Resonance Behavior of RbMnPhysical Review B, 1966