Patent ID: 8294133

Claim:
An electronic device comprising: an electrical conductivity changeable body in which a state of internal electrons is changed according to an electric field applied from the outside, to change its electrical conductivity; and electric field applying means for applying an electric field to the electrical conductivity changeable body from the outside, wherein the electrical conductivity changeable body comprises a compound having a layered triangular lattice structure, whose composition is expressed by (RMbO 3-δ ) n (MaO) m (where R is at least one element selected from In, Sc, Y, Dy, Ho, Er, Tm, Yb, Lu, Ti, Ca, Sr, Ce, Sn and Hf; Ma and Mb are at least one element selected from Ti, Mn, Fe, Co, Cu, Ga, Zn, Al, Mg and Cd so as to allow their overlapping; n is an integer number of 1 or more; m is an integer number of 0 or more; and δ is a real number of 0 or more and 0.2 or less).