THE PHASE DIAGRAM OF Rb2Mn0.7Mg0.3F4 IN A MAGNETIC FIELD

R. A. Cowley, R. J. Birgeneau, T. Thurston, G. Shirane
1988 Le Journal de Physique Colloques  
The phase diagram of the quasi-two-dimensional disordered antiferromagnet, Rb2Mno.7Mgo.3F4 in a uniform magnetic field along the unique c-axis has been measured using neutron scattering techniques. There are three distinct phases; at high temperatures the material is paramagnetic, and on cooling in fields above 1.7 T, it undergoes a transition to a spin-flopped phase with long range order perpendicular to the c-axis. The transition temperature decreases with decreasing magnetic field and is
more » ... ic field and is below 2 K at 1.75 T. At lower fields there is a phase in which different domain sizes are metastable and the metastability boundary decreases in temperature with increasing field and appears to meet the phase boundary for the spin-flopped phase at T = 0.
doi:10.1051/jphyscol:19888553 fatcat:55tlzknxhzhlpoxgt6tr6ukpoa