Moment compensation in NixRh1−x(Fe) from Moessbauer spectroscopy |
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Authors: | ER Seidel FJ Litterst W Gierisch GM Kalvius |
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Institution: | Physik-Department der Technischen Universität, München D-8046 Garching, Germany |
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Abstract: | The magnetic behaviour of very dilute 57Fe(≈20 ppm) impurities in paramagnetic NixRh1?x (x = 0.42 and x = 0.55) alloys has been studied by Moessbauer spectroscopy in the temperature range between 11 and 0.05 K and in external fields up to 5.6 T. The magnetic moment associated with the Fe-impurity is determined via the dependence of the hyperfine magnetic field on applied magnetic field and temperature. Below 4.2 K deviations from a free spin behaviour are found. The saturation hyperfine field becomes dependent on the applied field, a behaviour which is typical for impurity spin compensation. This compensation decreases with Ni concentration. |
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