Japanese Journal of Applied Physics · 1985 · 12 citations · 0 references
Natural SciencesMaterials SciencePhysicsCondensed Matter PhysicsOpticsSolid State PhysicsFerromagnetic MaterialsFerromagnetismMagnetic Properties Of SolidsMagnetism In SolidsPhase TransitionsPolarization OpticsBirefringenceBirefringence AnalysisFerroelectric Phase TransitionsFerromagnetic OrderingFerromagnetic Phase TransitionsMagnetic BirefringencePolarizationSpontaneous Polarization
Measurements of the spontaneous birefringence between 200 K to 10 K are reported. The symmetry of the ferromagnetic phases below 38 K is determined and consistent with Shubnikov point group m'm2'. A possible mechanism associated with the 28 K magnetic transition is proposed.