Nuclear orientation of Mn and Co in spin glass and re-entrant AuFe
作者： M Trhlik , P De Moors , J Camps , A L Erzinkyan , G M Gurevich
DOI: 10.1088/0953-8984/7/40/018
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摘要: Low-temperature nuclear orientation has been used to study the magnetic behaviour of 54Mn and 57Co impurities in AuFe alloy, below (14 at.% Fe-spin-glass state) above (18 Fe-re-entrant percolation threshold. The anisotropy gamma -rays was monitored direction external field, as a function field Bext up 8.5 T temperature range 4-40 mK. In Au86Fe14 we have found total misalignment Mn Co spins when 0 rather easy alignment with application Bext, which is typical for spin-glass behaviour. On other hand, both Au82Fe18 show an (mean value approximately 32 degrees ), even at 0, are turned only slowly by corresponds re-entrant state. difference results can be interpreted indication existence local correlations between Fe spins, supporting necessity using finite-range model
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