Author(s)

Abdelghani Sybous, Abdelhamid El Kaaouachi, Jamal Hemine, Abdelfattah Narjis, Lhoussine Limouny, Said Dlimi, Rachid Abdia, Gerard Biskupski

Laboratoire de Physique de la Matière Condensée, Faculté des Sciences et Techniques de Mohammadia, Département de Physique, Mohammedia, Morocco.
Laboratoire de Spectroscopie Hertzienne LSH, Batiment P5, Université des Sciences et Technologies de LilleI 59 655 Villeneuve d’Ascq Cedex France.
Research Group in ESNPS, Physics Department, University Ibn Zohr, Faculty of Sciences, B.P 8106, Hay Dakhla, Agadir, Morocco.

We present results of an experimental study of magnetoresistance (MR) in insulating NbSi amorphous alloys sample showing Variable Range Hopping (VRH) conductivity. The MR is found to be negative in a wide range of low temperature (4.2-20 K) and in the range of moderate magnetic fields (0-4 T). We made tentative analysis using three theoretical models which are the model of quantum interference, the model of Zeeman effect and the model of localized magnetic moments

NbSi Amorphous Alloys; Negative Magnetoresistance; Magnetic Field; Localized Magnetic moments; Quantum Interference

A. Sybous, A. El Kaaouachi, J. Hemine, A. Narjis, L. Limouny, S. Dlimi, R. Abdia and G. Biskupski, "Negative Magnetoresistance Behaviour and Variable Range Hopping Conduction in Insulating NbSi Amorphous Alloys at Very Low Temperature with aagnetic Field," Journal of Modern Physics, Vol. 3 No. 7, 2012, pp. 521-528. doi: 10.4236/jmp.2012.37071.