Spin reorientation transitions in Ho(1-x)Dy(x)Al(2) alloys

TitleSpin reorientation transitions in Ho(1-x)Dy(x)Al(2) alloys
Publication TypeJournal Article
Year of Publication2011
AuthorsKhan M, Gschneidner KA, Pecharsky VK
Journal TitleJournal of Applied Physics
Volume110
Pages103912
Date Published11
Type of ArticleArticle
ISBN Number0021-8979
Accession NumberWOS:000297943700088
Keywordsfield, heat, hoal2, magnetocrystalline anisotropy, SINGLE-CRYSTAL, tbal2
Abstract

HoAl(2) undergoes a first order spin reorientation transition at 20K, which is accompanied by a sharp peak in the heat capacity data. Here, we have explored the effect of Dy doping on the spin reorientation transitions in Ho(1-x)Dy(x)Al(2) alloys by heat capacity measurements. The first order spin reorientation transition in HoAl(2) changes to a second order transition as Ho is partially replaced by Dy in Ho(1-x)Dy(x)Al(2). The Curie temperature shifts to higher temperatures while the spin reorientation transition shifts to lower temperatures with increasing Dy concentration. The observations are interpreted by taking into consideration the higher order Stevens factors that significantly contribute to the free energy of the system. The magnetocaloric properties of the Ho1-xDyxAl2 alloys have also been calculated. (C) 2011 American Institute of Physics. [doi:10.1063/1.3662949]

DOI10.1063/1.3662949
Alternate JournalJ. Appl. Phys.