Room-temperature Synthesis of Magnetite Films by Ferrite Plating.

Nishimura, Kazuyuki; Kohara, Y.; Kitamoto, Y.; Abe, Matanobu

doi:10.3379/jmsjmag.24.515

Cited by 3 publications

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“…The large MR effect can be anticipated by the tunneling MR (TMR) through the thin insulating barriers between Fe3O4-grains. Relatively high IMRRI-results about 5 % at 1 T have been reported for room temperature (RT) TMR in Fe3O4 films with oxide barriers such as MgO [9], y -Fe2O3 [10][11][12] and ZnFe2O4 [13]. The MRR was defined here as [ p (11)-p maxi I p max, where p was the resistivity and p max was the maximum one in low magnetic field region.…”

Section: Introductionmentioning

confidence: 99%

Magneto-resistance of Nano-Fe3O4/Ag Granular System

et al. 2005

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Four kinds of Fe3O4/Ag granular systems were prepared from sintered mixtures of Fe3O4 and Ag or Ag2O. Magneto-resistances (MRs) were measured at room temperature for samples with Ag volume fraction x between 0 and 0.4. Samples including relatively large Fe3O4 grains showed 1% to 1.4% room temperature MR ratios (MRR) at 1 T. On the other hand, samples including Fe3O4 nano-particles showed large negative room temperature MRR of about-4% to-5% at 1 T near the percolation threshold of xc-0.2. It was suggested that Fe3O4/Ag/Fe3O4 paths were effective for the large IMRRI by the elastic conduction of spin-polarized electrons between Fe3O4 nano-particles. Possibility of spin accumulation in small Ag particles was also shown for this system.

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