Spin correlations and muon mobility in dilute Pd-Ni alloys |
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| Authors: | B D Rainford R Cywinski S H Kilcoyne C A Scott |
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| Institution: | (1) Department of Physics, University of Southampton, SO9 5NH Southampton, UK;(2) J J Thomson Physical Laboratory, Reading University, RG6 2AF Reading, UK;(3) ISIS Facility, Rutherford Appleton Laboratory, OX11 OQX Chilton, Oxon, UK |
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| Abstract: | The onset of ferromagnetism in Pd1-cNic alloys occurs at c=2.45 %. Dilute Pd-Ni alloys, with c=3.3% and 5.8% (Tc=20.5K and 90K) have been studied with SR. For transverse field geometry the data show a rapid increase in the relaxation rate as Tc is approached. However when the same alloys were studied in zero field, with longitudinal geometry, there was no sign of significant depolarisation at any temperature down to 12K. This result is attributed to the high mobility of muons in these alloys, resulting in extreme motional narrowing, as the muons sample magnetic domains of many different orientations. |
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