Influence of site preference of Al(Ga) atoms on magneto crystalline anisotropy of Gd2Co17 compounds

Chin J Mater Res

2004, Vol. 18

Issue (1): 88-88 DOI:

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Influence of site preference of Al(Ga) atoms on magneto crystalline anisotropy of Gd2Co17 compounds

;;F.R.de Boer;K.H.J.Buschow

桂林电子工业学院

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F.R.de Boer; K.H.J.Buschow. Influence of site preference of Al(Ga) atoms on magneto crystalline anisotropy of Gd2Co17 compounds. Chin J Mater Res, 2004, 18(1): 88-88.

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Abstract Al(Ga) concentration dependence of the magnetocrystalline anisotropy of Gd2Co17-xMx (M = Al, Ga; x ? 4 )compounds was investigated by magnetic measurements and X-ray diffraction on magnetically aligned powders. There is a change of magnetocrystalline anisotropy at room temperature from planar to axial for Gd2Co17-xAlx(x ≥1) and Gd2Co17-xGax(x ≥2) with increasing x. The sign reversal of the anisotropy constants K1 at room temperature occurs around x =0.9 and x =1.8 for Al-containing and Ga-containing compounds, respectively. The maximum positive value of K1 is reached in compounds for x = 3, adopting about three times higher Al-containing compounds than that of Ga-containing compounds. Evolution of Co-sublattice magnetocrystalline anisotropy is explained in terms of preferred site occupancy of Co sites in Gd2Co17 compound by Al(Ga). The results show that strong preferential occupancy by Al of 6c sites results in Al atom having a much stronger positive contribution to Co-sublattice anisotropy than Ga atom.

Key words: metallic materials magnetocrystaline anisotropy magnetic measurement site preference

Received: 20 March 2003

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