Magnetic properties of off-stoichiometric R2Co3Zn14 (R = Y, Gd) single crystals

TitleMagnetic properties of off-stoichiometric R2Co3Zn14 (R = Y, Gd) single crystals
Publication TypeJournal Article
Year of Publication2008
AuthorsSefat AS, Bud'ko SL, Canfield PC
Journal TitleJournal of Magnetism and Magnetic Materials
Volume320
Pages1035-1042
Date PublishedMar
Type of ArticleArticle
ISBN Number0304-8853
Accession NumberISI:000254416300042
Keywordsco, fe, flux growth, growth, heat capacity, LA-ND, magnetic anisotropy, magnetization, resistivity, single crystal x-ray, SM, TM, zincide
Abstract

Single crystal X-ray diffraction data indicate that the R2Co3Zn14 (R = Gd, Y) phase crystallizes non-stoichiometrically with a mixed occupancy of Co/Zn atoms on the 12-coordinated transition metal site and one of the three zinc sites. The crystals are rhombohedral with R-3m space group. Magnetization measurements provide no evidence of localized 3d electron moment in Y2Co2.3Zn14.7 which is nonmagnetic down to 1.8 K. Thermodynamic and transport measurements on two Gd2Co3+xZn14-x crystals reveal that the extra cobalt influences temperature below which the samples enter into an antiferromagnetic state: T-N 31.5(3) K for Gd2Co3Zn14 and 28(1) K for Gd2Co4.2Zn12.8. A lower magnetic ordering temperature of T-mag 6.0(2) K is common in both Gd samples. Published by Elsevier B. V.

DOI10.1016/j.jmmm.2007.10.015
Alternate JournalJ. Magn. Magn. Mater.