THE MAGNETORESISTANCE OF CARBON-BLACK SAMPLES AT DIFFERENT TEMPERATURES

被引：4

作者：

Aparecido-Ferreira, A. ^{[1
]}

Alves, E. S. ^{[1
]}

Ribeiro, G. M. ^{[1
]}

Sampaio, J. F. ^{[1
]}

机构：

[1] Univ Fed Minas Gerais, Dept Fis, BR-31270010 Belo Horizonte, MG, Brazil

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 2009年 / 23卷 / 12-13期

关键词：

Magnetoresistance; hopping; carbon-black; HOPPING CONDUCTIVITY;

D O I：

10.1142/S0217979209062621

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present experimental results for the magnetoresistance of carbon-black, in magnetic fields (B) up to 15 T, and its temperature dependence at temperatures (T) from 10 K to 1.2 K. At these temperatures the electrical conduction is given by variable range hopping with Coulomb gap. The results show a B-2 dependence at low fields and a B-1/2 dependence in the limits of high fields. We show that the model of hydrogenlike localized states cannot explain the experimental results.

引用

页码：2960 / 2963

页数：4

共 7 条

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