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 29μ...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.展开更多
A series of Fe_(45.51)(Al_(2)0_(3))_(54.49)nano-granular films were prepared using ion-b€am sputtering technique.A saturated h^ll resistivity of about 12.5μΩ·cm at room temperature was observed.The trstnsmissio...A series of Fe_(45.51)(Al_(2)0_(3))_(54.49)nano-granular films were prepared using ion-b€am sputtering technique.A saturated h^ll resistivity of about 12.5μΩ·cm at room temperature was observed.The trstnsmission electron microscopy image showed that very small Fe particles of smaller than Inm are embedded in Al_(2)0_(3)matrix,and connected into network.The measured p-T curve indicated that this giant Hall effect may originate from the percolation phenomenon.With different annealing temperature(TA)up to 300℃,the saturated Hall resistivity decreased only a little.The good thermal stability of Fe_(45.51)(Al_(2)0_(3))_(54.49)nano-granular Films showed potential application for magnetic sensor.展开更多
基金Supported in part by the National Key Project for Basic Research under Grant No.G1999064508the National Natural Science Foundation of China under Grant No.19890310(4).
文摘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.
基金Supported in part by the National Natural Science Foundation of China under Grant No.19890310(4)the Climbing Program of China(NMS-07)Natural Science Foundation of Jiangsu(BK97039).
文摘A series of Fe_(45.51)(Al_(2)0_(3))_(54.49)nano-granular films were prepared using ion-b€am sputtering technique.A saturated h^ll resistivity of about 12.5μΩ·cm at room temperature was observed.The trstnsmission electron microscopy image showed that very small Fe particles of smaller than Inm are embedded in Al_(2)0_(3)matrix,and connected into network.The measured p-T curve indicated that this giant Hall effect may originate from the percolation phenomenon.With different annealing temperature(TA)up to 300℃,the saturated Hall resistivity decreased only a little.The good thermal stability of Fe_(45.51)(Al_(2)0_(3))_(54.49)nano-granular Films showed potential application for magnetic sensor.
