A recording layer 6 records and stores information and comprises a plurality of layers, namely a first layer 6a and a second layer 6b. The first layer 6a is made from a recording material which gives parallel directions to saturation magnetization and sublattice magnetization. The second layer 6b is made from a recording material which gives antiparallel directions to saturation magnetization and sublattice magnetization at room temperature. The recording material for the second layer 6b gives parallel directions to saturation magnetization and sublattice magnetization at around a read temperature.