Dopant-segregation-controlled ZnO single-grain-boundary varistors

Sato, Yukio; Yodogawa, Masatada; Yamamoto, Takahisa; Shibata, Naoya; Ikuhara, Yuichi
April 2005
Applied Physics Letters;4/11/2005, Vol. 86 Issue 15, p152112
Academic Journal
A ZnO single-grain-boundary varistor was designed using a bicrystal. Pr and Co dopant cosegregation at the boundary, key to obtain high varistic property, is optimized by controlling grain-boundary misorientation and, hence, grain-boundary atomic structure. Thus obtained single grain boundary exhibited sufficiently high varistic property. The present result opens up the possibility of single-grain-boundary varistors required for future nanoscale electronic devices.


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