Untitled

Abstract

Rare earth ion ferrite RFe 2 O 4 (R = Y, Dy, Ho, Er, Tm, Yb, Lu, Sc, or In) has been attracted much attention due to its anomal physical properties as a candidate of electronic ferroelectric. Although most of reports were discussed by bulk sample, much effort has been made in fabricating film of RFe 2 O 4 recently. Finally the charge order was directly observed just recently. Also some data indicate the spin-charge-orbital coupling. In this paper, the film growth and electric, magnetic and optical properties of the films are briefly reviewed.