Abstract (EN):
Spontaneous spin-reorientation transitions in ErFeO3 are studied using ultrasound, magnetic susceptibility, and magnetic moment measurements. The properties of the first-order transition happening in magnetic field sweeps through zero are studied and a three-dimensional (H, T) magnetic phase diagram of the material is constructed. Direct measurements of the magnetic moment allow for a precise determination of the temperature dependence of the magnetization direction in the reorientation region. The mean-field theory of orientation transitions is modified to account for the magnetism of the erbium subsystem, and an excellent agreement with experiment is achieved. © 2004 The American Physical Society.
Language:
English
Type (Professor's evaluation):
Scientific
No. of pages:
10