Excess low frequency conduction noise in a granular composite

J. V. Mantese, W. I. Goldburg, D. H. Darling, H. G. Craighead, U. J. Gibson, R. A. Buhrman, W. W. Webb

Research output: Contribution to journalArticlepeer-review

34 Scopus citations


Granular composites consisting of 25% nickel as 8 nm diameter particles dispersed in an aluminium oxide matrix display excess conduction noise. Co-deposited films with resistance per square about 105 ohms and negative temperature coefficient show a noise power spectral density Sv(f{hook}) = Sv(1) f{hook}α where α ≅ 1.10 ± 0.03 over the accessible spectral range of 0.1 Hz ≲ f{hook} ≲ 5000 Hz. The amplitude 3 × 10-15 ≲ Sv(1) ≲ 5 × 10-12 V2Hz-1, appears to increase approximately quadratically as the applied voltage Vs up to Vs ≲ 2.5 V and as the first power of Vs for 2.5 ≲ Vs < 35 V.

Original languageEnglish (US)
Pages (from-to)353-357
Number of pages5
JournalSolid State Communications
Issue number4
StatePublished - Jan 1981

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry


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