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Magnetic properties and crystal structure of R2Co17− xGaxcompounds

Authors
Journal
Journal of Alloys and Compounds
0925-8388
Publisher
Elsevier
Publication Date
Volume
270
Identifiers
DOI: 10.1016/s0925-8388(98)00497-6
Keywords
  • Magnetic Properties
  • Preferential Site Occupation
  • Rare Earth Cobalt Compounds
  • R2Co17− Xgax
  • Spin Reorientation

Abstract

Abstract We have studied the magnetic properties of several R 2Co 17− x Ga x compounds with R=Y, Tb, Dy and Ho. X-ray diffraction measurements made on magnetically aligned powders of Y 2Co 17− x Ga x compounds showed that these materials retain their easy-plane magnetisation at room temperature up to at least x=5. The difference in behaviour with the corresponding Gd compounds and the absence of spin-reorientation phenomena in R 2Co 17− x Ga x compounds in which the R component has a negative second-order Stevens factor is discussed in terms of preferred site occupation of the Ga atoms. High-field measurements at 5 K were made on free powders of several Tb, Dy and Ho compounds. The intrasublattice constants derived from these data are somewhat smaller than those of the undiluted R 2Co 17 compounds, which is also discussed in terms of preferred Ga site occupation.

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