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- W1982259051 abstract "Acetic acid molecule-coated Fe 3 O 4 nanoparticles, 450–650 nm in size, have been synthesized using a chemical solvothermal reduction method. Fourier transform infrared spectroscopy measurements confirm one monolayer acetic acid molecules chemically bond to the Fe 3 O 4 nanoparticles. The low-field magnetoresistance (LFMR) of more than −10% at room temperature and −23% at 140 K is achieved with saturation field of less than 2 kOe. In comparison, the resistivity of cold-pressed bare Fe 3 O 4 nanoparticles is six orders of magnitudes smaller than that of Fe 3 O 4 /molecule nanoparticles, and the LFMR ratio is one order of magnitude smaller. Our results indicate that the large LFMR in Fe 3 O 4 /molecule nanoparticles is associated with spin-polarized electrons tunnelling through molecules instead of direct nanoparticle contacts. These results suggest that magnetic oxide-molecule hybrid materials are an alternative type of materials to develop spin-based devices by a simple low-cost approach." @default.
- W1982259051 created "2016-06-24" @default.
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- W1982259051 date "2010-12-16" @default.
- W1982259051 modified "2023-09-27" @default.
- W1982259051 title "Large low-field magnetoresistance in Fe<sub>3</sub>O<sub>4</sub>/molecule nanoparticles at room temperature" @default.
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- W1982259051 doi "https://doi.org/10.1088/0022-3727/44/2/025001" @default.
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