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Takayuki Harada, Isao Ohkubo, Mikk Lippmaa, Yasuaki Sakurai, Yuji Matsumoto, Shunsuke Muto, Hideomi Koinuma and Masaharu Oshima Spintronics: Large Tunnel Magnetoresistance in Epitaxial Oxide Spin-Filter Tunnel Junctions (Adv. Funct. Mater. 21/2012) Advanced Functional Materials 22

Article first published online: 2 NOV 2012 | DOI: 10.1002/adfm.201290129

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A spin-polarized-current generator is a fundamental device in spintronics. As reported on page 4471, Isao Ohkubo and co-workers have developed a highperformance spin-filter tunnel junction by growing an atomic-layer-controlled oxide multilayer. In this device, up-spin electrons can selectively tunnel through a nanometer-thick ferromagnetic insulator, while down-spin electrons are reflected. The image shows a false-colored cross-sectional transmission electron microscope image of the device.

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