Large Magnetoresistance of Nickel-Silicide Nanowires: Non-Equilibrium Heating of Magnetically-Coupled Dangling Bonds

详细信息    查看全文

• 作者：T. Kim ; R. V. Chamberlin ; J. P. Bird
• 刊名：Nano Letters
• 出版年：2013
• 出版时间：March 13, 2013
• 年：2013
• 卷：13
• 期：3
• 页码：1106-1110
• 全文大小：325K
• 年卷期：v.13,no.3(March 13, 2013)
• ISSN：1530-6992

文摘

We demonstrate large (>100%) time-dependent magnetoresistance in nickel-silicide nanowires and develop a thermodynamic model for this behavior. The model describes nonequilibrium heating of localized spins in an increasing magnetic field. We find a strong interaction between spins but no long-range magnetic order. The spins likely come from unpaired dangling bonds in the interfacial layers of the nanowires. The model indicates that although these bonds couple weakly to a thermal bath, they dominate the nanowire resistance.
<h4>Keywords: h4> Self-assembled nanowires; nanostructured silicides; magnetoresistance; interfacial spins; nanomagnetism; heat transfer in nanostructures