The effect of Er doping on the spin reorientation transition in Ho(1-x)Er(x)Al(2)

TitleThe effect of Er doping on the spin reorientation transition in Ho(1-x)Er(x)Al(2)
Publication TypeJournal Article
Year of Publication2012
AuthorsKhan M, Gschneidner KA, Pecharsky VK
Journal TitleJournal of Magnetism and Magnetic Materials
Volume324
Pages1381-1384
Date Published04
Type of ArticleArticle
ISBN Number0304-8853
Accession NumberWOS:000299010100021
KeywordsC15, EXCHANGE, field, heat, hoal2, Lanthanide material, laves-phase compound, magnetic anisotropy, MAGNETIC-ANISOTROPY, magnetocrystalline anisotropy, SINGLE-CRYSTAL, Spin reorientation, tbal2
Abstract

The magnetothermal properties of pseudo binary Ho(1-x)Er(x)Al(2) alloys have been investigated by heat capacity measurements. Two anomalies are observed in the heat capacity of HoAl(2). A sharp peak at 20 K represents the first order spin reorientation transition, and a second order anomaly occurs in the vicinity of the ferromagnetic transition at 32 K. As Ho is partially replaced by Er in Ho(1-x)Er(x)Al(2) the sharpness of the first order heat capacity peak diminishes with increasing Er concentration, while the temperature of this transition remains practically unaffected. The second order ferromagnetic transition shifts to higher temperature region with increasing Er concentration. The observed behaviors are explained considering the geometry of 4f charge densities of Ho(3+) and Er(3+) and the easy magnetization directions of HoAl(2) and ErAl(2). (C) 2011 Elsevier B.V. All rights reserved.

URL<Go to ISI>://WOS:000299010100021
DOI10.1016/j.jmmm.2011.11.045
Alternate JournalJ. Magn. Magn. Mater.