Electrical conduction of Ti/TiOx/Ti structures at low temperatures and high magnetic fields

Author： Batkova Marianna   Batko Ivan  

Publisher： Edp Sciences

E-ISSN： 1286-0050|73|3|30301-30301

ISSN： 1286-0042

Source： EPJ Applied Physics (The), Vol.73, Iss.3, 2016-03, pp. : 30301-30301

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Abstract

We present results of electrical conduction studies of Ti/TiOx/Ti planar structures prepared by tip-induced local anodic oxidation (LAO) of titanium thin films. The prepared structures have shown almost linear I-V curves at temperatures between 300 K and 30 K, and only slight deviation from linear behaviour at lower temperatures. Electrical conductance of the structures can be adequately explained by a two-channel model where variable range hopping channels and metallic ones coexist in parallel, while a crossover from Mott to Efros-Shklovskii variable-range-hopping conductivity has been observed at decreasing temperature. The magnetoresistance of the studied structures is very small even in magnetic fields up to 9 T. The reported electrical properties of the structures indicate their promising applications as very low heat capacity temperature sensors for cryogenic region and high magnetic fields.

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