Magnetotransport properties of undoped amorphous carbon films
作者： Jimin Wang , Xiaozhong Zhang , Caihua Wan , Johan Vanacken , Victor V. Moshchalkov
DOI: 10.1016/J.CARBON.2013.03.019
关键词: Materials science 、 Condensed matter physics 、 Amorphous solid 、 Deposition temperature 、 Nuclear magnetic resonance 、 Amorphous carbon 、 Magnetic field 、 Saturation (magnetic) 、 Pulsed laser deposition 、 Magnetoresistance
摘要: Abstract Anomalous positive magnetoresistance (MR) up to 36% was observed at 2 K and 12 T in the undoped amorphous carbon (a-C) film deposited on glass substrate by pulsed laser deposition 500 °C. There is no tendency of saturation MR with increase magnetic field. The decreases as measurement temperature increases from 2 80 K, could hardly be above 80 K. As grows 300 600 °C, disorder degree a-C decreases, value also indicating that lower results a smaller MR. mechanism this ascribed wave function shrinkage. It help understand phenomenon material systems.
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