title: Strongly bias-dependent tunnel magnetoresistance in manganite spin filter tunnel junctions.
abstract: A highly unconventional bias-dependent tunnel magnetoresistance (TMR) response is observed in Sm0.75 Sr0.25 MnO3 -based nanopillar spin filter tunnel junctions (SFTJs) with two different behaviors in two different thickness regimes of the barrier layer. Thinner barrier devices exhibit conventional SFTJ behaviors; however, for larger barrier thicknesses, the TMR-bias dependence is more complex and reverses sign at higher bias.
authors.affiliation: Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge, CB3 0FS, UK.
authors.forename: Bhagwati
authors.initials: B
authors.lastname: Prasad
authors.affiliation: Department of Electrical and Computer Engineering, Texas A&M University, College Station, Texas, 77843-3128, USA.
authors.forename: Wenrui
authors.initials: W
authors.lastname: Zhang
authors.affiliation: Department of Electrical and Computer Engineering, Texas A&M University, College Station, Texas, 77843-3128, USA.
authors.forename: Jie
authors.initials: J
authors.lastname: Jian
authors.affiliation: Department of Electrical and Computer Engineering, Texas A&M University, College Station, Texas, 77843-3128, USA.
authors.forename: Haiyan
authors.initials: H
authors.lastname: Wang
authors.affiliation: Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge, CB3 0FS, UK.
authors.forename: Mark G
authors.initials: MG
authors.lastname: Blamire
keywords: Coulomb blockade; Fowler-Nordheim tunneling; manganites; spin filter; tunnel magnetoresistance