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

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

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.

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), Article 132509. https://doi.org/10.1063/1.2357581

• Journal Article Type: Article
• Acceptance Date: Sep 25, 2006
• Publication Date: Oct 6, 2006
• Journal: APPLIED PHYSICS LETTERS
• Print ISSN: 0003-6951
• Electronic ISSN: 1077-3118
• Publisher: American Institute of Physics
• Peer Reviewed: Peer Reviewed
• Volume: 89
• Issue: 13
• Article Number: 132509
• DOI: https://doi.org/10.1063/1.2357581
• Keywords: Physics and Astronomy (miscellaneous)
• Public URL: https://hull-repository.worktribe.com/output/387214