Negative Magnetoresistance Behaviour and Variable Range Hopping Conduction in Insulating NbSi Amorphous Alloys at Very Low Temperature with aagnetic Field

• 作者: Abdelfattah Narjis Abdelghani Sybous Abdelhamid El Kaaouachi Gerard Biskupski Jamal Hemine Lhoussine Limouny Rachid Abdia Said Dlimi
• 来源期刊: 现代物理(英文)
• 学科: 医学
• 关键词: NbSi Amorphous Alloys Negative MAGNETORESISTANCE MAGNETIC FIELD LOCALIZED MAGNETIC MOMENTS Quantum Interference
• 年，卷（期）: 2012,（7）
• 页码范围: 521-528
• 页数: 8页
• 分类号: R73

摘要

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