Patent ID: 9741927
Date: 2017-08-22
CPC Classifications: H01L

Claim:
1. A magnetic junction for use in a magnetic device comprising: a reference layer; a nonmagnetic spacer layer; and a free layer, the nonmagnetic spacer layer being between the free layer and the reference layer, the free layer having a gradient in a magnetic ordering temperature such that a first portion of the free layer has a first magnetic ordering temperature higher than a second magnetic ordering temperature of a second portion of the free layer and such that the second portion of the free layer has the second magnetic ordering temperature higher than a third magnetic ordering temperature of a third portion of the free layer, the first portion of the free layer being closer to the reference layer than the second portion of the free layer, the second portion of the free layer being closer to the reference layer than the third portion of the free layer, the gradient being such that the magnetic ordering temperature decreases with increasing distance from the reference layer, the first portion of the free layer transitioning from a first magnetically disordered state to a first magnetically ordered state at the first magnetic ordering temperature, the second portion of the free layer transitioning from a second magnetically disordered state to a second magnetically ordered state at the second magnetic ordering temperature, the third portion of the free layer transitioning from a third magnetically disordered state to a third magnetically ordered state at the third magnetic ordering temperature; wherein the gradient in the magnetic ordering temperature corresponds to at least one of an exchange coupling critical temperature gradient, a saturation magnetization (M