Electrical resistivity of amorphous Ni80−xMxB16Si4 alloys
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The electrical resistivity of amorphous Ni80−xMxB16Si4 alloys, M standing for any of the 3d transition metals, was studied in the temperature range ∼2–950 K. The resistivity versus M plots (at constant x) yield typical double-peaked curves, with a minimum at Mn. The origin of this resistivity behaviour is discussed. All the samples show a resistivity minimum, probably due to Kondo effect, at Tmin, which is strongly composition dependent. Negative temperature coefficients of resistivity found about room temperature for several alloys are the consequence of Tmin lying well above room temperature for those alloys.Keywords:
Atmospheric temperature range
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The electrical resistivity of TiB2 has been measured using a DIA-6 cubic anvil apparatus at pressures up to 8 GPa and temperatures up to 800 K. The ambient-condition resistivity is determined to be 13.3 (±0.9) μΩ cm. The resistivity decreases with increasing pressure. At pressures above 2 GPa, the pressure dependence of the resistivity is about −0.36 μΩ cm/GPa. On heating, the resistivity increases linearly with temperature. The measurements at simultaneously high pressure (3.2 GPa) and high temperatures yield a temperature dependence of 46 (±5) nΩ cm/K for the resistivity.
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Atmospheric temperature range
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The electrical resistivity of amorphous Ni80−xMxB16Si4 alloys, M standing for any of the 3d transition metals, was studied in the temperature range ∼2–950 K. The resistivity versus M plots (at constant x) yield typical double-peaked curves, with a minimum at Mn. The origin of this resistivity behaviour is discussed. All the samples show a resistivity minimum, probably due to Kondo effect, at Tmin, which is strongly composition dependent. Negative temperature coefficients of resistivity found about room temperature for several alloys are the consequence of Tmin lying well above room temperature for those alloys.
Atmospheric temperature range
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This chapter contains sections titled: Introduction Basic Concepts and Definitions Production of Metallic Glasses Experimental Methods for Structure Determination of Metallic Glasses and Amorphous Alloy Melts Structures of Metallic Glasses Comparison of the Structures of Metallic Glasses and Amorphous Alloy Melts. Rough Models of Metallic Glasses and Amorphous Alloy Melts Casting of Metallic Glasses. Crystallization Processes in Amorphous Alloy Melts Classification of Metallic Glasses Properties and Applications of Metallic Glasses Summary Exercises References
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