| Cr80-xFe20Mnx(x=10,15,20)合金的低温电阻率和热导率 |
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| 引用本文： | 李波,吴柏枚,高惠平,王明,杜行,王小平.Cr80-xFe20Mnx(x=10,15,20)合金的低温电阻率和热导率[J].低温物理学报,2005,27(1):8-12. |
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| 作者姓名： | 李波 吴柏枚 高惠平 王明 杜行 王小平 |
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| 作者单位： | 中国科学技术大学,物理系,合肥,230026;中国科学技术大学,结构分析开放实验室,合肥,230026;中国科学技术大学,物理系,合肥,230026;北京有色金属研究总院,北京 |
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| 基金项目： | 国家自然科学基金(No.10174070)和国家重点基础研究专项经费(NKBRSF-G19990646)资助项目. |
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| 摘 要： | 报道了Cr80-xFe20Mnx(x=10，15，20)合金在10—300K的电阻率和热导率．结果表明样品的电输运性质和热输运性质均与样品的磁状态有关．在SDW反铁磁转变附近，电阻率出现极小．对Neel温度以下电阻率-温度曲线拟合结果表明：取温度相关的能隙函数2△∝√（TN-T）可以很好地描述SDW反铁磁能隙随温度降低而打开的过程．合金在反铁磁转变温度以下表现出与无序样品或者玻璃态样品类似的热导率温度关系，这可能是源于合金中磁性团簇的散射．
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| 关 键 词： | CrFeMn合金 电阻率 热导率 SDW反铁磁 |
LOW TEMPERATURE THERMAL CONDUCTIVITY AND ELECTRICAL RESISTIVITY OF Cr80-xFe20Mnx (x=10, 15, 20) |
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| LI BO WU BAI MEI , GAO HUI PING WANG MING DU KAN WANG XIAO PING Structural Research Lab,University of Science and Technology of China,Heffei.LOW TEMPERATURE THERMAL CONDUCTIVITY AND ELECTRICAL RESISTIVITY OF Cr80-xFe20Mnx (x=10, 15, 20)[J].Chinese Journal of Low Temperature Physics,2005,27(1):8-12. |
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| Authors: | LI BO WU BAI MEI GAO HUI PING WANG MING DU KAN WANG XIAO PING Structural Research Lab University of Science and Technology of China Heffei |
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| Institution: | LI BO 2+ WU BAI MEI 1,2 GAO HUI PING 2 WANG MING 2 DU KAN 2 WANG XIAO PING 3 1Structural Research Lab,University of Science and Technology of China,Heffei 230026 2Department of Physics,University of Science and Technology of China,Hefei 230026 3General Research Institute for Nonferrous Metals,Beijing |
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| Abstract: | Thermal conductivity and electrical resistivity of Cr\- 80- x Fe\- 20 Mn\- x , x =10, 15, 20 are measured. It is found that the thermal and electrical transport properties are related to the magnetic state of these alloys. Near Neel temperature, a minimum is observed in electrical resistivity. The temperature dependence of electrical resisitiviy indicates the progressive opening up of the SDW antiferromagnetic energy gap and can be well described by a temperature dependent function. Below Neel temperature, the alloys experiences similar thermal conductivity temperature dependence to the amorphous or glass sample due to the existence of scatterings from magnetic clusters. |
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| Keywords: | CrFeMn Alloy Electrical Resistivity Thermal Conductivity SDW AFM |
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