Magneto-resistance effects in bismuth; an historical summary.---(1) Bismuth in bulk. This historical sketch includes allusions to the most important work which has been done on the effect of a magnetic field upon the resistance of bismuth in bulk. A complete set of references is included. (2) Bismuth films. A summary has also been prepared of experiments on the effect of a magnetic field on the resistance of bismuth films obtained by cathodic sputtering.Magneto-resistance effects in films of bismuth; an experimental investigation.---Films of bismuth were deposited on glass by cathodic sputtering. These films showed initially no change of resistance when placed in a magnetic field of 16,000 gauss. It was found that by heating to a temperature near the melting point of bismuth this property could be partially restored. This change in the film as a result of heating seemed to be accompanied by a crystallization of the metal as indicated by photomicrographs. The films had a negative temperature coefficient of resistance.
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Becker et al. (1920) studied this question.
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