Non-ohmic conduction in bismuth at 4.2°K

James, Conrad D.; Creasey, C.J.; Aubrey, John

doi:10.1016/0031-9163(65)90385-9

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The Residual Resistance Of Metals1

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1966

1969

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“…In fact in 1965 experiments on bismuth at 4.2 O K by James et al (1965) with measuring currents of the order of 1 A showed nonohmic behaviour which was attributed to self magnetoresistance in the sample, and due to this phenomenon, for a current of 10 A the residual resistance can be over twice as large as its 'true' value.…”

Section: The Residual Resistance Of Metalsmentioning

confidence: 99%

The residual resistance of metals

James¹

1967

Phys. Educ.

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The need for producing high purity materials for semiconducting devices and studies of the electrical properties of metals at low temperatures has hastened the improvement of techniques for providing such materials; probably the biggest step in this direction came from Pfann's work on zone refining in 1952. Conventional gravimetric and spectrographic techniques have, in general, been found inadequate for detecting the minute impurity concentrations in present day high purity materials. Two techniques which have emerged in this new era of impurity detection are radioactive tracer methods and the residual resistance method; the standing of the latter in relation to recent developments involving magnetoresistance and size effects are discussed here.

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Section: The Residual Resistance Of Metalsmentioning

confidence: 99%