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. 2017 May 16;8:15232. doi: 10.1038/ncomms15232

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(a) High-resolution cross-sectional TEM image of an MTJ. Both the GdO_x barrier and CoFeB electrodes are amorphous in the present samples. Scale bar is 3 nm in length. (b) A representative RT magnetoresistance curve of a GdO_x-pMTJ showing a TMR of 15%.