Epitaxial growth of Fe nanodots on SrF2/Si (111)

Hosoya, Hiroyuki; Arita, Masashi; Hamada, K.; Takahashi, Yasuo

doi:10.1016/j.msec.2005.09.051

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2006

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“…In this work, we studied Fe-SrF 2 granular films. The insulating material SrF 2 was often used as an optical material [17], and the epitaxial growth on the Si substrate was studied [18,19]. However, the Fe-SrF 2 granular system has not yet been reported on.…”

Section: Introductionmentioning

confidence: 99%

Structural and electromagnetic characterizations of Fe–SrF₂granular films

Hosoya¹,

Arita²,

Hamada³

et al. 2006

J. Phys. D: Appl. Phys.

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Abstract.We investigate composite Fe-SrF 2 films to explore new materials showing the granular type tunneling magnetoresistance (TMR) effect. The films are composed of Fe nano-particles embedded in a SrF 2 matrix. The electromagnetic properties of the ferromagnetic metal-insulator films are confirmed, including super-paramagnetism, tunnel conduction, and TMR. We obtain a TMR of 3% at RT and 5% at 77 K. The film resistivity is much higher than that of oxide-based granular film. We also fabricate the nanostructures of granular films and aim at the application of the single-electron transistor. As a result, we observed Coulomb blockade (CB) region and CB oscillation at low temperature.

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Section: Introductionmentioning

confidence: 99%