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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Magnetoresistance in the region of the possible metal-insulator transition in icosahedral AlPdRe
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Magnetoresistance in the region of the possible metal-insulator transition in icosahedral AlPdRe

机译：二十面体AlPdRe中可能的金属-绝缘体跃迁区域的磁阻

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摘要

The magnetoresistance, #DELTA##rho#(B,T)/#rho#(T), has been measured between 200 mK and 20 K, in magnetic fields up to 12 T for icosahedral AlPdRe quasicrystals of nominal composition Al_(70.5)Pd_(21.5)Re_8. Samples of varying resistivities and residual resistance ratios, R [=#rho#(4 K)/#rho#(295 K)], were studied. An analysis of #DELTA##rho#(B,T)/#rho#(T) in terms of quantum interference effects (QIE) was made, taking into account the possibility of QIE contributions to #DELTA##rho#(T) up to room temperature. The results show that the regime of diffusive metallic conduction in i-AlPdRe extends up to R in the range of 20, corresponding approximately to #rho#(4 K) up to 10~5 #mu##OMEGA# cm, beyond which a description of #DELTA##rho#(B,T)/#rho#(T) in terms of QIE breaks down.
机译：对于标称成分为Al_（70.5）的二十面体AlPdRe准晶体，在高达12 T的磁场中测得的磁阻＃DELTA＃rho＃（B，T）/＃rho＃（T） Pd_（21.5）Re_8。研究了不同电阻率和剩余电阻比R [=＃rho＃（4 K）/＃rho＃（295 K）]的样品。考虑到QIE对＃DELTA ## rho＃（T的贡献）的可能性，对＃DELTA＃rho＃（B，T）/＃rho＃（T）进行了量子干涉效应（QIE）分析。 ）至室温。结果表明，i-AlPdRe中的扩散金属传导机制在20范围内一直扩展到R，大约相当于＃rho＃（4 K）直到10〜5＃mu ## OMEGA＃cm，超出此范围关于QIE的＃DELTA ## rho＃（B，T）/＃rho＃（T）的描述不完整。

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