Sl. Gnatchenko et al., 2-STEP METAMAGNETIC PHASE-TRANSITION INDUCED BY A MAGNETIC-FIELD PARALLEL TO THE B-AXIS IN DYFEO3, Journal of magnetism and magnetic materials, 129(2-3), 1994, pp. 307-312
By means of magnetic and magneto-optic studies performed in the temper
ature range 1.7-6 K, the phase diagram of DyFeO3 in the presence of a
magnetic field in the crystallographic (ab) plane was determined. Desp
ite earlier theoretical predictions, a certain temperature interval wa
s found in which the transition from the Gamma(5)(g(x)a(y))Gamma(1)(G(
y)A(x)C(z)) to the Gamma(3)(f(y)c(x))Gamma(4)(G(x)A(y)F(z)) phase is a
two-step transition even when the magnetic field is directed exactly
along the b-axis. A qualitative explanation of the observed phenomena
resulting from the appearance of the Gamma(1234)(F(x)F(y)F(z)G(x)G(y)G
(z)) phase in the iron subsystem, is proposed.