Patent ID: 9336846
Filing Date: 2016-05-10
CPC Classification: G11C,H01L

Claim Text:
1. MRAM element having a magnetic tunnel junction comprising: a reference layer having a fixed reference magnetization; a storage layer having a storage magnetization; a tunnel barrier layer between the storage layer and the reference layer; and a storage antiferromagnetic layer; the MRAM element further comprising a current line in electrical contact with one end of the magnetic tunnel junction and arranged for passing a heating current in the magnetic tunnel junction for heating the magnetic tunnel junction; wherein the storage antiferromagnetic layer having a first function of pinning the storage magnetization when the magnetic tunnel junction is at a low threshold temperature and freeing the storage magnetization when the magnetic tunnel junction is heated at a high threshold temperature; and wherein the storage antiferromagnetic layer further having an electrical resistivity comprised between 1 mΩ-cm and 3000 mΩ-cm such that the storage antiferromagnetic layer has a second function of heating the magnetic tunnel junction when the heating current is passed in the magnetic tunnel junction via the current line, wherein the storage antiferromagnetic layer further comprises at least one metallic element such as to vary the electrical resistivity of the storage antiferromagnetic layer; said at least one metallic element comprises one or a plurality of metallic layers embedded in the storage antiferromagnetic layer.