TITLE

Electrical transport study of magnetomechanical nanocontact in ultrahigh vacuum using carbon nanowalls

AUTHOR(S)
Chi Zhang; Ying Wang; Leihua Huang; Yihong Wu
PUB. DATE
August 2010
SOURCE
Applied Physics Letters;8/9/2010, Vol. 97 Issue 6, p062102
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We present the results of an experimental study on a magnetomechanical nanocontact in ultrahigh vacuum, which is formed between a Ni nanoprobe and carbon nanowalls. The latter are thin graphite sheets grown almost vertically on a SiO2/Si substrate which greatly facilitates the formation of nanocontacts with adjustable contact size. Very large magnetoresistance with well-defined hysteresis and reproducibility has been observed at room temperature, which is interpreted as being caused by the magnetomechanical effect. Instead of functioning merely as an on/off switch, the linear response to an external field within a finite range makes this kind of nanocontact potentially also useful for sensing applications.
ACCESSION #
52929626

 

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