Magnetic ordering in GdAuCd

• Published in: Journal of magnetism and magnetic materials Vol. 280; no. 1; pp. 90 - 100
• Main Authors: Łątka, Kazimierz, Kmieć, Roman, Pacyna, Andrzej W., Fickenscher, Thomas, Hoffmann, Rolf-Dieter, Pöttgen, Rainer
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01-09-2004; Elsevier Science
• Subjects: Cadmium; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Crystal structure; Exact sciences and technology; Intermetallic compound; Magnetic properties and materials; Magnetic resonances and relaxations in condensed matter, mössbauer effect; Magnetism; Mössbauer effect; other γ-ray spectroscopy; Mössbauer spectroscopy; Physics; Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source x-ray scattering, etc.); Cadmium; Magnetism; Intermetallic compound; Mössbauer spectroscopy; Crystal structure; Antiferromagnetism; Cadmium alloys; Coordination number; Moessbauer effect; Gold alloys; Magnetic ordering; Transition element compounds; Ternary alloys; Polycrystals; Intermetallic compound: Crystal structure; Experimental study; Magnetic susceptibility; Gadolinium alloys; Magnetic properties
• ISSN: 0304-8853
• DOI: 10.1016/j.jmmm.2004.02.025

A polycrystalline sample of GdAuCd was prepared by reaction of the elements in a sealed tantalum ampoule in an induction furnace. The structure was studied by X-ray powder and single-crystal diffraction: ZrNiAl type,
P
6
̄
2m
,
a=770.1(2),
c=396.0(1)
pm,
wR2=0.0493 for 252
F
2 values and 14 variables. The structure contains two crystallographically different gold sites with tricapped trigonal prismatic coordination: [Au1Cd
3Gd
6] and [Au2Cd
6Gd
3]. Together the gold and cadmium atoms form a three-dimensional [AuCd] network in which the gadolinium atoms fill distorted hexagonal channels. The magnetic and electronic properties have been studied by means of AC and DC magnetic susceptibility measurements as well as
155Gd Mössbauer spectroscopy on powder samples. It was found that GdAuCd orders antiferromagnetically at
T
N=66.5
K.