LOW-TEMPERATURE CONDUCTIVITY AND MAGNETOCONDUCTIVITY OF ICOSAHEDRAL AL70MN9PD21

被引：40

作者：

CHERNIKOV, MA ^{[1
]}

BERNASCONI, A ^{[1
]}

BEELI, C ^{[1
]}

OTT, HR ^{[1
]}

机构：

[1] RUSSIAN ACAD SCI,INST GEN PHYS,MOSCOW 117942,RUSSIA

来源：

EUROPHYSICS LETTERS | 1993年 / 21卷 / 07期

关键词：

AMORPHOUS AND POLYMERIC MATERIALS GLASSES; ELECTRONIC CONDUCTION IN METALS AND ALLOYS; GALVANOMAGNETIC AND OTHER MAGNETOTRANSPORT EFFECTS;

D O I：

10.1209/0295-5075/21/7/009

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Measurements of the electrical conductivity and magnetoconductivity are reported for icosahedral Al70Mn9Pd21 at low temperatures. Above 1 K, the sigma(T) variation is consistently described by a sum of weak-localization and Coulomb-interaction terms. Below 1 K, the conductivity varies as sigma-(T) = sigma(0) + a square-root T which may entirely be ascribed to a Coulomb-interaction correction. In this regime, the magnetoconductivity is positive. For magnetic fields up to 45 kOe, sigma(T) keeps its square-root T-dependence. The parameter a decreases with magnetic field, which contradicts theoretical expectations.

引用

页码：767 / 772

页数：6

共 22 条

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