Interface stability of magnetic tunnel barriers and electrodes
Interface stability of magnetic tunnel barriers and electrodes
复制标题
磁隧道势垒和电极的界面稳定性
DOI:
10.1002/pssa.200675682
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发表时间:
2007
期刊:
影响因子:
--
通讯作者:
Lamperti A
中科院分区:
文献类型:
--
作者:
Lamperti A
Grazing incidence X‐ray scattering duringin‐situannealing has been used to study the interface stability in MgO‐based electrodes and barriers in magnetic tunnel junctions (MTJs). In MTJs based on Co60Fe20B20/MgO, low temperature annealing at about 200 °C can result in a drop in the tunnelling magnetoresistance (TMR). Specular reflectivity measurements show a change in fringe structure at high scattering vector, at the temperature at which the TMR drops. Also, a change in diffuse scatter relative to the specular scatter is observed. Annealing of [Co60Fe60B20/MgO]×14multilayers prepared by three different techniques shows no change in the specular Bragg peaks with no loss of Kiessig fringe structure on crystallization and no change in the diffuse scatter up to 200 °C. We suggest that diffusion of Mn from the IrMn pinning layer, present in the MTJs but not in the multilayers, may be responsible for the differences in TMR behaviour. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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发表时间:
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