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Träfflista för sökning "L773:0305 4608 srt2:(1979)"

Search: L773:0305 4608 > (1979)

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1.
  • Malmhall, Roger, et al. (author)
  • Hall resistivity of a two-phase magnetic material - crystallised Metglas 2826
  • 1979
  • In: Journal of Physics F: Metal Physics. - : Institute of Physics (IOP). - 0305-4608. ; 9:2, s. 317-325
  • Journal article (peer-reviewed)abstract
    • Hall resistivity measurements in the temperature range 100-800 K have been used to study the influence of thermal cycling and annealing on amorphous Fe40Ni40P14B6. While the as-received sample has Tc = 510 K. thermal cycling to 700 K yields a two-phase system. one of the phases having a broad transition around 425 K. Annealing for three hours at 800 K causes this transition to sharpen up. and we also observe a second transition at 730 K. The extraordinary Hall coefficient (R1) has been analysed and is described in terms of linear contributions from each phase. From simultaneous measurements of the ohmic resistivity ρ on the same sample it is found that, for the two-phase material. R1 is related to ρ as R1 = aρ + bρ2 for 100 < K < 300 K. In the amorphous state there is an anomaly in ρ at Tc. From the relationship between R1(T) and ρ(T) it is concluded that in both amorphous and crystallised materials the side jump is of the same order of magnitude as in dilute Fe alloys.
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2.
  • Sundqvist, Bertil, et al. (author)
  • Measurement of the pressure dependence of the electron-phonon interaction in aluminium
  • 1979
  • In: Journal of Physics F: Metal Physics. - Bristol : Institute of Physics. - 0305-4608. ; 9:9, s. L161-L166
  • Journal article (peer-reviewed)abstract
    • The authors report measurements of the electrical resistance of aluminium in the temperature range 30-40 degrees C and the pressure range 0.2-1.0 GPa. From these experiments the pressure dependence of the electron-photon interaction lambda is evaluated. With p in GPa the result is lambda (p)= lambda 0 exp(-0.0467p+4.7*10-4 p2). This expression for lambda describes accurately the observed pressure dependence of the superconducting Tc for pressures up to about 4 GPa.
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  • Result 1-2 of 2
Type of publication
journal article (2)
Type of content
peer-reviewed (2)
Author/Editor
Rao, K. V. (1)
Sundqvist, Bertil (1)
Bäckström, Gunnar (1)
Rapp, Östen (1)
Malmhall, Roger (1)
Bhagat, S.M. (1)
University
Umeå University (2)
Language
English (2)
Research subject (UKÄ/SCB)
Natural sciences (2)
Year
1979 (2)Undo refine

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