Mössbauer study of the magnetic properties of Fe2-xM xP1-yAsy type compounds, M = Cr, Mn, Fe, Co, NiReport as inadecuate




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Abstract : The series of phosphides and arsenophosphides of the first row transition metals with formula Fe2-xMxP1-yAsy is studied by Mössbauer spectrometry. The question of the attribution of the quadrupolar couplings to both sites of Fe2P is solved, by applying the technique of polarization. All the compounds of the series Cr 2P1- yAsy 1 % 57Fe, the phosphides Ni2P 1 % 57Fe and FeNiP are found paramagnetic down to 77 K. The Néel points of the compounds Mn2P1-yAs y and FeMnP are determined in rather good agreement with the previous measurements. The compound CO2P distinguishes itself by its sensitivity to the stoichiometry, indeed an addition of 5 % of phosphorus does abruptly decrease the Curie point.

Keywords : antiferromagnetic properties of substances chromium compounds cobalt compounds Curie temperature ferromagnetic properties of substances iron compounds magnetic properties of substances manganese compounds Mossbauer effect Neel temperature nickel compounds paramagnetic properties of substances





Author: M. Wautelet A. Gérard F. Grandjean

Source: https://hal.archives-ouvertes.fr/



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