ANOMALOUS HALL-EFFECT RELATED TO THE MAGNETIZATION IN PURE DECAGONAL AL-MN PHASES

被引：20

作者：

GOZLAN, A ^{[1
]}

BERGER, C ^{[1
]}

FOURCAUDOT, G ^{[1
]}

OMARI, R ^{[1
]}

LASJAUNIAS, JC ^{[1
]}

PREJEAN, JJ ^{[1
]}

机构：

[1] CNRS,CTR RECH TRES BASSES TEMP,F-38042 GRENOBLE,FRANCE

来源：

PHYSICAL REVIEW B | 1991年 / 44卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.44.575

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An anomalous Hall effect is measured in pure decagonal Al80Mn20 and Al78Mn22. We show that the Hall resistivity rho-H is linear with the magnetization M measured for the same fields and temperatures: rho-H(H,T) = R0H + 4-pi-R(S)M(H,T). The very dominant term R(S)M of rho-H reveals a strong spin-orbit scattering, which is observed in Al-Mn quasicrystals. R(S) is found to be temperature independent in the range 6.5-110 K. From our susceptibility, specific-heat, and magnetoresistance data, we deduce that M results from a very low fraction of magnetic moments, which increase drastically with the nominal Mn concentration and that are correlated by Ruderman-Kittel-Kasuya-Yosida interactions. In this respect, the Al-Mn decagonal phase behaves very similarly to previously measured Al-Mn icosahedral and amorphous phases.

引用

页码：575 / 583

页数：9

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