Giant Positive Magnetoresistance in Grain-Oriented Cx Co1-x Alloys
ZHANG Dong-Jie
Laboratory of Materials Science, Nanjing Normal University,
Nanjing 210097
Giant Positive Magnetoresistance in Grain-Oriented Cx Co1-x Alloys
ZHANG Dong-Jie
Laboratory of Materials Science, Nanjing Normal University,
Nanjing 210097
关键词 ：
75.10.-b ,
75.30.Vn ,
75.70.Pa
Abstract ： The grain-oriented Cx Co1-x (x = 0.9, 0.5) samples were fabricated by the hot-pressing method. The microstrucre was observed by an x-ray diffractometer and a scanning electron microscope. The resistance against the applied magnetic field was measured by a standard four-point probe method at different temperatures. The magnetoresistance and the magnetization ratio were studied as a function of magnetic field in the range of -1800 kA/m-1800 kA/m at different temperatures from 50 K to 300 K. The magnetoresistance of grain-oriented Cx Co1-x is positive. The maximum positive MR of 98% at 50 K and 34% at 300 K was obtained under 1800 kA/m magnetic field in the C0.9 Co0.1 sample.
Key words ：
75.10.-b
75.30.Vn
75.70.Pa
出版日期: 2003-10-01
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2003, Vol. 20 
