Patent ID: 8481181

Claim:
A magnetic storage article, comprising: first magnetic elements having anisotropy, H k1 , volume, V 1 ; and second magnetic elements magnetically exchange coupled to the first magnetic elements, the second magnetic elements having anisotropy H k2 , and volume V 2 , wherein a thermal stability of the exchange coupled magnetic elements is greater than about 60 k B T at a storage temperature of about 300 K and a magnetic switching field distribution, SFD, of the exchange coupled magnetic elements is less than about 200% at a predetermined magnetic switching field and a predetermined assisting switching energy, wherein the first magnetic elements and the second magnetic elements are disposed in a single layer, the first magnetic elements are laterally adjacent to the second magnetic elements in the layer H k1 ≠H k2 and V 1 ≠V 2 .