RESISTANCE VARIABLE ELEMENT, RESISTANCE VARIABLE STORAGE DEVICE AND RESISTANCE VARIABLE DEVICE

摘要

A resistance variable element (10), a resistance variable storage device and a resistance variable device are provided with a first electrode(2); a second electrode (4); and a resistance variable layer (3), which is arranged between the first electrode (2) and the second electrode (4) and is electrically connected with the first electrode (2) and the second electrode (4). The resistance variable layer (3) includes a material, which is expressed by a chemical formula of (Ni_XFe_1-X)Fe₂O_4, where X is 0.35 or more but not more than 0.9, and has a spinel structure. The resistance variable element, the resistance variable storage device and the resistance variable device have such characteristics that the electrical resistance between the first electrode (2) and the second electrode (4) lowers when a first voltage pulse having a first voltage is applied between the first electrode (2) and the second electrode (4) and that the electrical resistance between the first electrode (2) and the second electrode (4) increases when a second voltage pulse having a second voltage with a polarity different from that of the first voltage is applied between the first electrode (2) and the second electrode (4).