Abstract
Zero and longitudinal field μSR have been used to study the evolution of spin correlations and magnetic order resulting from 10at% substitution of Zr for Nb in the weak itinerant antiferromagnet NbFe2. Rapidly fluctuating atomic fields (λ=0.02μs−1) are found to persist almost unchanged to low temperatures. These coexist with a narrow distribution of static fields (σ=0.2μs−1) which evolves from a gaussian to lorentzian form between 90K and the Curie temperature of 43K. It is suggested that these effects may be a consequence of topologically frustrated exchange between Fe sites in the C14 structure.
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Crook, M.R., Cywinski, R. Spin fluctuations and magnetic order in Nb1−xZrxFe2 . Hyperfine Interact 85, 203–208 (1994). https://doi.org/10.1007/BF02069422
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DOI: https://doi.org/10.1007/BF02069422