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http://dx.doi.org/10.4283/JKMS.2012.22.5.162

Electrical Characteristics of Magnetic Tunnel Junctions with Different Cu-Phthalocyanine Barrier Thicknesses  

Bae, Yu-Jeong (Department of Physics, Ewha Womans University)
Lee, Nyun-Jong (Department of Physics, Ewha Womans University)
Kim, Tae-Hee (Department of Physics, Ewha Womans University)
Publication Information
Journal of the Korean Magnetics Society / v.22, no.5, 2012 , pp. 162-166 More about this Journal
Abstract
V-I characteristics of Fe(100)/MgO(100)/Cu-phthalocyanine (CuPc)/Co hybrid magnetic tunnel junctions were investigated at different temperatures. Fe(100) and Co ferromagnetic layers were separated by an organic-inorganic hybrid barrier consisting of different thickness of CuPc thin film grown on a 2 nm thick epitaxial MgO(100) layer. As the CuPc thickness increases from 0 to 10 nm, a bistable switching behavior due to strong charging effects was observed, while a very large magenetoresistance was shown at 77 K for the junctions without the CuPc barrier. This switching behavior decreases with the increase in temperature, and finally disappears beyond 240 K. In this work, high-potential future applications of the MgO(100)/CuPc bilayer were discussed for hybrid spintronic devices as well as polymer random access memories (PoRAMs).
Keywords
organic-inorganic hybrid structure; PoRAM; spintronic devices; charge transport phenomena;
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