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Hall effect in amorphous metals

 

作者: D. G. Naugle,   K. Rhie,  

 

期刊: AIP Conference Proceedings  (AIP Available online 1992)
卷期: Volume 286, issue 1  

页码: 61-74

 

ISSN:0094-243X

 

年代: 1992

 

DOI:10.1063/1.44719

 

出版商: AIP

 

数据来源: AIP

 

摘要:

The experimental data on the Hall effect in paramagnetic amorphous transition metal alloys are reviewed. A positive sign for the Hall coefficient RHis observed for a surprisingly large number of transition metal alloys in contrast to the negative sign usually reported for alloys containing only simple metal components. The temperature dependence of RHin amorphous metals is usually quite small and has been attributed to weak localization effects. A strong temperature dependence of RHfor certain paramagnetic alloys with compositions near the boundary between paramagnetic and ferromagnetic phases has been observed. For certain alloys the sign of RHcan be changed from negative to positive by either a change in temperature or a change in composition. The fact that the temperature dependence of RHfollows the susceptibility suggests that an anomalous contribution to RHdominates the usual Lorentz contribution. An explanation of the observation of positive values in RHin a large range of alloys based on an anomalous contribution to &sgr;xythat is independent of the scattering and proportional to the susceptibility is presented. Theoretical explanations for such a term include the side‐jump mechanism and a new derivation from consideration of magnetic energy.

 

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