Strongly bias-dependent tunnel magnetoresistance in manganite spin filter tunnel junctions.
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Authors
Prasad, Bhagwati
Zhang, Wenrui
Jian, Jie
Wang, Haiyan
Blamire, Mark G
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.
Description
Keywords
Coulomb blockade, Fowler-Nordheim tunneling, manganites, spin filter, tunnel magnetoresistance
Journal Title
Adv Mater
Conference Name
Journal ISSN
0935-9648
1521-4095
1521-4095
Volume Title
27
Publisher
Wiley
Publisher DOI
Sponsorship
This work was partially supported by the ERC Advanced Integrators Grant “SUPERSPIN”. B.P.
was funded by the Nehru Trust for Cambridge University and St John’s College. The TEM work at
Texas A&M was supported by the U.S. National Science Foundation (NSF-DMR 0846504).