欧姆接触
材料科学
量子隧道
热传导
凝聚态物理
纳米纤维
晶界
大气温度范围
导电体
纳米技术
光电子学
微观结构
复合材料
物理
热力学
图层(电子)
作者
Pengcheng Du,Peng Zhou,Nannan Liu,Yajun Qi,Tianjin Zhang
摘要
We present a strong non-Ohmic transport characteristic in an individual Y3Fe5O12 (YIG) nanofiber at low temperature. The structural characterization reveals that the nanofiber consists of a multitude of nanoparticles stacked along the nanofiber axis. The non-Ohmic conductive behavior manifests itself by a strong input current dependence and the nonlinear I–V curves with a critical temperature around 160 K. The current measured at temperatures lower than 160 K follows the Simmons tunneling model, and the tunneling through the grain boundary is proposed to interpret the non-Ohmic feature in an individual YIG nanofiber. However, the observed resistance follows a T−1/4 variation in the high temperature range (> 160 K), suggesting a variable range hopping conduction.
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