57Fe NMR observation of the short-range order effects in erbium orthoferrite in the erbium subsystem ordering region
I. M. VitebskiĭPhysicotechnical Institute, Academy of Sciences of the Ukrainian SSR, DonetskN. M. KovtunPhysicotechnical Institute, Academy of Sciences of the Ukrainian SSR, DonetskG. A. TroitskiiPhysicotechnical Institute, Academy of Sciences of the Ukrainian SSR, DonetskV. M. KhmaraPhysicotechnical Institute, Academy of Sciences of the Ukrainian SSR, Donetsk
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Peculiarities of 57Fe NMR spectra in ErFeO3 are investigated in the vicinity of Tc = TN2 (H) (for H∥ c-axis of the crystal) of the low-temperature spin-reorientation transition due to the erbium subsystem ordering. An analysis of the spectra shows that for T > Tc, a long-living short-range order with a symmetry of the low-temperature phase Γ1 which is nominally realized at T < Tc, is established in the erbium subsystem of ErFeO3.
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