Magnetic properties of nickel and platinum quaternary borocarbides |
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Authors: | L. Cristofolini A. Lappas K. Prassides K. Vavekis M. Buchgeister |
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Affiliation: | 1. School of Chemistry and Molecular Sciences, University of Sussex, Brighton, BN1 9QJ, UK 2. Institut für Festk?rper‐ und Werkstofforschung Dresden e.V., D‐01171, Dresden, Germany
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Abstract: | The zero‐field μ+SR technique is employed to study the magnetic properties of the non‐superconducting borocarbides Sm1-xLuxNi2B2C (x=0.0, 0.2) and NdPt1.5Au0.6B2C. Coherent ordering of the Sm electronic moments appears below TN=9.86(3) and 4.15(3) K for the x=0.0 and 0.2 compositions, respectively. No long range order of the Nd3+ moments is found in NdPt1.5Au0.6B2C down to 80 mK. Freezing of the electronic moments into a spin‐glass state occurs at Tfapprox 1.2 K. A stretched exponential decay of the μ+ spin polarisation is observed above Tf with the exponent beta smoothly decreasing on approaching Tf from above, reminiscent of the behaviour in other spin glasses. This revised version was published online in July 2006 with corrections to the Cover Date. |
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