6533b86efe1ef96bd12cbd7c
RESEARCH PRODUCT
Impact of Annealing Temperature on Tunneling Magnetoresistance Multilayer Stacks
Joel CramerM. TarequzzamanMathias KläuiGerhard JakobLeo SchnitzspanJan Kubiksubject
010302 applied physicsMaterials scienceCondensed matter physicsMagnetoresistanceAnnealing (metallurgy)02 engineering and technologyCondensed Matter::Mesoscopic Systems and Quantum Hall Effect021001 nanoscience & nanotechnology01 natural sciencesElectronic Optical and Magnetic MaterialsCondensed Matter::Materials ScienceTunnel magnetoresistanceExchange biasFerromagnetismCondensed Matter::Superconductivity0103 physical sciences0210 nano-technologyQuantum tunnellingdescription
The effect of annealing temperatures on the tunnel magnetoresistance (TMR) of MgO-based magnetic tunnel junctions (MTJs) has been investigated for annealing between 190 and 370°C. The TMR shows a maximum value of 215% at an annealing temperature of 330°C. A strong sensitivity of the TMR and the exchange bias of the pinned ferromagnetic layers on the annealing temperature are observed. Depending on sensor application requirements, the MTJ can be optimized either for stability and pinning strength or for a high TMR signal by choosing the appropriate annealing temperature. The switching mechanism of the ferromagnetic layers in the MTJ and the influence of the annealing on the layer properties, including the MgO barrier, are discussed.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-01-01 | IEEE Magnetics Letters |