Patent ID: 9231194
Filing Date: 2016-01-05
CPC Classification: G11C,H01F,H01L

Claim Text:
1. An apparatus comprising: a magnetic tunnel junction (MTJ) including a free magnetic layer, a fixed magnetic layer, and a tunnel barrier between the free and fixed layers; the tunnel barrier directly contacting a first side of the free layer; an oxide layer directly contacting a second side of the free layer; and alternating layers of first and second materials, wherein one of the alternating layers directly contacts the oxide layer opposite where the free layer contacts the oxide layer; wherein (a) the tunnel barrier includes an oxide and has a first resistance-area (RA) product and the oxide layer has a second RA product that is lower than the first RA product; (b) the first side is directly opposite the second side; and (c) the tunnel barrier includes a first metal and the oxide layer includes a second metal unequal to the first metal.