Giant Positive Magnetoresistance in Grain-Oriented CxCo1-x Alloys |
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作者姓名: | 张栋杰 |
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作者单位: | LaboratoryofMaterialsScience,NanjingNormalUniversity,Nanjing210097 |
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摘 要: | The grain-oriented CxGo1-z (x = 0.9, 0.5) samples were fabricated by the hot.pressing method. The microstruc-ture 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-polnt 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 GxGo1-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 C0.9Go0.1 sample.
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关 键 词: | 巨磁致电阻 晶粒取向 CxCo1-x合金 热压法 PMR 磁学性质 钴碳合金 |
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