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    Tunnel magnetoresistance in epitaxial (100)-oriented FeCo/LiF/FeCo magnetic tunnel junctions

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    Abstract

    We fabricated fully epitaxial magnetic tunnel junctions with LiF tunnel barriers on Si (100) substrates with high-vacuum electron-beam deposition. By changing the thickness of the LiF barrier, tunnel magnetoresistance of up to 90% at 77 K (17% at room temperature) was observed at tLiF = 2.8 nm. The magnetoresistanceratio as a function of the LiF barrier thickness shows a similar trend with that in magnetic tunnel junctions using epitaxial MgO barriers. There is a rapid decrease of the magnetoresistance ratio with increasing bias-voltage and temperature, indicating the presence of imperfections in the LiF barriers.

     

    © Xue, Q., Yang, Y., Gao, Z., Liu, F., Li, Q., Li, S., & Miao, G.-X. (2016). Tunnel magnetoresistance in epitaxial (100)-oriented FeCo/LiF/FeCo magnetic tunnel junctions. Applied Physics Letters, 109(19), 192407. https://doi.org/10.1063/1.4967473

    Author(s)

    Qian Xue, Yihang Yang, Zhiwei Gao, Fen Liu, Qiang Li, Shandong Li, Guo-Xing Miao

    Date

    2016-11-09

    Publication

    Applied Physics Letters

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