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Type: Artigo de periódico
Title: Magnetocrystalline Anisotropy Of Non-uniaxial R-t Magnetic Materials Studied By The Singular Point Detection Technique: An Application To R2fe17-xgax Compounds (r = Y Or Gd And X = 0 Or 1)
Author: Kou X.C.
Sinnecker E.H.C.P.
Grossinger R.
Abstract: The easy magnetization direction of R2Fe17-xGax lies within the basal plane over all magnetic ordering temperatures. A spinning-sample magnetic alignment technique was used to align the basal planes of fine single crystallites of R2Fe17-xGax (R = Y or Gd and x = 0 or 1) to be parallel to each other. The degree of magnetic alignment was checked by x-ray diffraction. The magnetocrystalline anisotropy field of R2Fe17-xGax has been determined by a singularity appearing in the curve of d2M/dt2 versus H measured on a magnetically aligned sample when an external field is applied perpendicular to aligned basal planes. The temperature dependence of the anisotropy fields was measured from 4.2 K up to the corresponding Curie temperatures. It was found that the Curie temperatures of R2Fe17 compounds with R = Y or Gd were enhanced upon partial substitution of Fe by Ga. However, the magnetic anisotropy fields of Ga-containing compounds are smaller than those of the corresponding pure R2Fe17 compounds at low temperatures.
Rights: fechado
Identifier DOI: 10.1088/0953-8984/8/10/025
Date Issue: 1996
Appears in Collections:Unicamp - Artigos e Outros Documentos

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