We have investigated magnetotransport properties of magnetic tunnel junctions (MTJ) with rock-salt type ZnO(001) or MgO/ZnO(001) barriers by both calculation and experiments. The first-principles transmission FDOFXODWLRQV EDVHG RQ 1(*) PHWKRG FODULIHG WKDW WKH 0J2=Q2 EDUULHU KDG FRKHUHQW WXQQHOLQJ WKURXJK Ʀ1 state such as a conventional MgO(001) barrier. Experimental results revealed that the MTJs with an MgO/ZnO barrier had an MR ratio of 70 % at a low resistance-area(RA) product of 0.5 :Pm 2. This MR ratio is almost the same as the MgO barrier or higher. The rock-salt type ZnO(001)-based MTJs seem to be suitable for application to the read magnetic heads of hard-disk drives (HDDs) with an areal recording density of over 500 Gbits/in 2 .
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