Magnetization, magnetostriction, rotation moments, thermal expansion, Young's modulus, and internal friction were measured in rare-earth orthoferrites (orthochromites) to study spontaneous and induced magnetic phase transitions in them. The measurements were conducted in fields not exceeding 60 kOe, in the 1.7-140 K temperature range. New orientation phase transitions are found, experimental phase (H, T)-diagrams are constructed, and microscopic mechanisms of the phase transitions are discussed.
Department of General Physics for Natural Science Faculties, Faculty of Physics, Moscow State University, Leninskie Gory, Moscow, 119992, Russia
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