Patent ID: 8207518

Claim:
An information recording and reproducing device comprising: a first layer; a second layer; and a recording layer provided between the first layer and the second layer and being capable of reversibly changing between a first state having a first resistance and a second state having a second resistance higher than the first resistance by a current supplied via the first layer and the second layer, the recording layer including: a first compound layer; and an insulating layer, the first compound layer containing a first compound, the first compound including a first cation element and a second cation element of a type different from the first cation element, at least one of the first cation element and the second cation element being a transition element having a d-orbital partially filled with electron, at least one of the first cation element and the second cation element being an element selected from group 1 to 4 elements and group 12 to 17 elements in a periodic table, the insulating layer containing a third compound, and the third compound including an element selected from group 1 to 4 elements and group 12 to 17 elements in the periodic table.