Properties of RRe2Al10 (R=Y, Gd–Lu) crystals

Athena S. Sefat, Sergey L. Bud’ko, and Paul C. Canfield
Phys. Rev. B 79, 174429 – Published 22 May 2009

Abstract

Large single crystals of rare-earth rhenium aluminide RRe2Al10, with R=Y, and Gd–Lu were grown out of an Al-rich solution. Single crystal x-ray diffraction data confirmed the orthorhombic Cmcm structure for all members: R=Gd-Dy with TbRe2Al10-structure type (formula unit per cell Z=8); R=Y, and Ho–Lu with LuRe2Al10-structure type (Z=12). There is no evidence of a localized 3d electron moment in R=Y and Lu; R=Yb is nonmagnetic down to 1.8 K, but develops an enhanced electronic specific heat of 95mJmol1K2. Ordering temperatures range from ferromagnetic order in R=Gd with Tc=7.2(1)K, antiferromagnetic order in R=Tb at TN=5.0(3)K, to R=Dy, Ho, and Er giving magnetic ordering temperatures of Tmag=1.7(1), 0.4, and 1.1(2) K, respectively. All compounds have effective moments close in value to that of free R3+ at high temperatures.

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  • Received 17 March 2009

DOI:https://doi.org/10.1103/PhysRevB.79.174429

©2009 American Physical Society

Authors & Affiliations

Athena S. Sefat, Sergey L. Bud’ko, and Paul C. Canfield

  • Department of Physics and Astronomy, Ames Laboratory, Iowa State University, Ames, Iowa 50011, USA

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Issue

Vol. 79, Iss. 17 — 1 May 2009

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