Patent ID: 7502188

Claim:
A magnetic recording medium comprising: a first magnetic layer; and a second magnetic layer formed on said first magnetic layer, wherein: said first magnetic layer and said second magnetic layer make exchange coupling therebetween and also have their respective magnetizing directions anti-parallel to one another; a net residual area magnetization of said first magnetic layer and said second magnetic layer is expressed by the following formula: |Mr1×t1−Mr2×t2| where Mr 1 and Mr 2 denote respective ones of residual magnetization of said first magnetic layer and residual magnetization of said second magnetic layer, and t 1 and t 2 denote respective film thicknesses of them; the net area magnetization at a first temperature is larger than the net area magnetization at a second temperature lower than said first temperature; and said first magnetic layer and said second magnetic layer comprise in-plane orientation films.