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Effect of interface passivation on the magnetoresistance of granular magnetite Fe3(1-δ)O4

Rybchenko, S. I.; Fujishiro, Y.; Takagi, H.; Awano, M.

Authors

Y. Fujishiro

H. Takagi

M. Awano

Abstract

The reductive passivation of granular interface was proposed to enhance the tunneling magnetoresistance of bulk granular magnetite. For this, an annealing in paraffin wax has been applied. As a result, the low-field magnetoresistance response was increased up to 8% at 300 K and 32% at 130 K. The effect is attributed to the passivation-induced depletion of density of the tunneling-active spin-depolarized interface states. The obtained results indicate the important role of interface states in tunneling contacts with magnetite electrodes and suggest a way to control these states. © 2005 American Institute of Physics.

Journal Article Type Article
Publication Date Oct 6, 2006
Journal APPLIED PHYSICS LETTERS
Print ISSN 0003-6951
Electronic ISSN 1077-3118
Publisher AIP Publishing
Peer Reviewed Peer Reviewed
Volume 89
Issue 13
Article Number 132509
Institution Citation Rybchenko, S. I., Fujishiro, Y., Takagi, H., & Awano, M. (2006). Effect of interface passivation on the magnetoresistance of granular magnetite Fe3(1-δ)O4. Applied physics letters, 89(13), doi:10.1063/1.2357581
DOI https://doi.org/10.1063/1.2357581
Keywords Physics and Astronomy (miscellaneous)