摘要
TheHall Effect of(Co_(0.34)Fe_(0.66))_(0.42)(SiO_(2))_(0.58)Granular Films(volume fraction)granular films were fabricated by using magnetron sputtering technique,and a saturated Hall resistivity ρ_(xys) of about 29μΩ.cm was observed at room temperature,which was almost 3 orders of magnitude greater than that in the pure ferromagnetic sample.The measured linear dependence of resistivity ρ_(xx) vs log_(10)T and magnetoresistance effect indicated that the Co_(0.34)Fe_(0.66) volume fraction in the films were near percolation threshold.The giant Hall effect inHall Effect of(Co_(0.34)Fe_(0.66))_(0.42)(SiO_(2))_(0.58)Granular Films granular film may originate from percolation phenomenon.
作者
XU Qing-Yu
NI Gang
WANG Zhi-Ming
SANG Hai
DU You-Wei
徐庆宇;倪刚;王志明;桑海;都有为(National Laboratory of Solid State Microstructures,Nanjing University,Nanjing 210093;Centre for Advanced Studies in Science and Technology of Microstructures,Nanjing 210093)
基金
Supported in part by the National Key Project for Basic Research under Grant No.G1999064508
the National Natural Science Foundation of China under Grant No.19890310(4).
