Abstract
By means of magnetic and magneto-optic studies performed in the temperature range 1.7–6 K, the phase diagram of DyFeO 3 in the presence of a magnetic field in the crystallographic ( ab) plane was determined. Despite earlier theoretical predictions, a certain temperature interval was found in which the transition from the Γ 5(g x a y )Γ 1( G y A x C z ) to the Γ 3( f y c x )Γ 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 Γ 1234( F xF yF zG xG yG z ) phase in the iron subsystem, is proposed.
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