Abstract
The magnetic susceptibility of Zn alloys containing 7.6–182 ppm Mn were measured in the range 1.4–4.2 K. The zero-field susceptibility can be described by a Curie-Weiss law with a concentration-independent intercept on the temperature axis, which yields a Kondo temperatureT K =0.24 K. A value for the effective number of Bohr magnetons on a Mn atom ofp=4.66 is found. Resistivity was measured on specimens containing 7.8–38 ppm Mn in the range 0.1–4.2 K. The resistivity of all specimens was proportional to logT at high temperatures but, except for the lowest concentration specimen, it showed evidence of ordering below 0.5 K. The data for the 7.8-ppm Mn specimen showed no evidence of ordering down to 0.1 K, and could be fitted to the formula of Hamann. Allowing for potential scattering, the resistivity at 0 K is found to be 45 µΘ · cm/at. % Mn. This value is in agreement withd-wave unitarity limit when corrected for the appreciable deviation of the Fermi surface in zinc from a free-electron sphere.
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Research supported by the National Science Foundation. Based in part on a Ph.D. thesis by R. S. Newrock submitted to the Graduate Faculty of Rutgers University.
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Newrock, R.S., Serin, B., Vig, J. et al. The Kondo effect inZnMn. J Low Temp Phys 5, 701–710 (1971). https://doi.org/10.1007/BF00628418
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DOI: https://doi.org/10.1007/BF00628418