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Proceedings Paper

Large magnetoresistance in Fe3O4/molecule nanoparticles
Author(s): S. Wang; F. J. Yue; L. Lin; Y. J. Shi; D. Wu
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Paper Abstract

In this work, we successfully fabricate Fe3O4 nanoparticles self-assembled with molecules to explore a new approach of studying the molecular spintronics. Fourier transform infrared spectroscopy measurements indicate that one monolayer molecules chemically bonds to the Fe3O4 nanoparticles and the physically absorbed molecules do not exist in the samples. The magnetoresistance (MR) of molecule fully coated ~10 nm size nanoparticles is up to 7.3% at room temperature and 17.5% at 115 K under a field of 5.8 kOe. And the MR ratio is more than two times larger than that of pure Fe3O4 nanoparticles. This enhanced MR is likely arising from weak spin scattering while carriers transport through the molecules. Moreover, a very large low field magnetoresistance is also observed with ~500nm ferromagnetic Fe3O4 nanoparticles coated with acetic acid molecules. Those features open a door for the development of future spin-based molecular electronics.

Paper Details

Date Published: 24 August 2010
PDF: 7 pages
Proc. SPIE 7760, Spintronics III, 77601D (24 August 2010); doi: 10.1117/12.861452
Show Author Affiliations
S. Wang, Nanjing Univ. (China)
F. J. Yue, Nanjing Univ. (China)
L. Lin, Nanjing Univ. (China)
Y. J. Shi, Nanjing Univ. (China)
D. Wu, Nanjing Univ. (China)

Published in SPIE Proceedings Vol. 7760:
Spintronics III
Henri-Jean M. Drouhin; Jean-Eric Wegrowe; Manijeh Razeghi, Editor(s)

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