TITLE

Magnetocapacitance and exponential magnetoresistance in manganite–titanate heterojunctions

AUTHOR(S)
Nakagawa, N.; Asai, M.; Mukunoki, Y.; Susaki, T.; Hwang, H. Y.
PUB. DATE
February 2005
SOURCE
Applied Physics Letters;2/21/2005, Vol. 86 Issue 8, p082504
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We present a rectifying manganite–titanate heterojunction exhibiting a magnetic field tunable depletion layer. This creates a large positive magnetocapacitance, a direct measure of the field-induced reduction of the effective depletion width across the junction. Furthermore, the reduction of the junction barrier shifts the forward bias characteristics, giving exponentially enhanced differential magnetoresistance, occurring despite the absence of a spin filter. These results provide a unique probe of a Mott insulator/band insulator interface, and further suggest electronic devices incorporating the magnetic field sensitivity of these strongly correlated electron materials.
ACCESSION #
16581354

 

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