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Takayuki Harada, Isao Ohkubo, Mikk Lippmaa, Yasuaki Sakurai, Yuji Matsumoto, Shunsuke Muto, Hideomi Koinuma and Masaharu Oshima Large Tunnel Magnetoresistance in Epitaxial Oxide Spin-Filter Tunnel Junctions Advanced Functional Materials 22

Version of Record online: 2 JUL 2012 | DOI: 10.1002/adfm.201200985

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An epitaxial oxide spin-filter tunnel junction is fabricated by pulsed laser deposition with atomic-layer precision. By cutting magnetic coupling at a spin filter/spin detector interface, clear tunnel magnetoresistance exceeding 120% is obtained. The composition-controlled magnetic hardness of a Pr0.8Ca0.2Mn1-yCoyO3 spin filter layer makes it possible to develop an epitaxial double spin filter tunnel junction.

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