UNSPECIFIED (1998) Single crystal growth by the floating-zone method of a geometrically frustrated pyrochlore antiferromagnet, Tb2Ti2O7. JOURNAL OF CRYSTAL GROWTH, 191 (4). pp. 740-745. ISSN 0022-0248

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Abstract

Large, high quality, single crystals of Tb2Ti2O7, have been successfully grown by the floating zone method under a controlled atmosphere. Crystals, approximately 3-5 mm in diameter and up to 20 mm in length. were grown from a small seed crystal. Several crystals have been characterised to determine their crystal quality, chemical structure and magnetic properties and these results were compared to those of sintered polycrystalline pellets. These materials were shown to have the face centred cubic structure, Fd-3m, with a room temperature lattice parameter a = 10.12(7) Angstrom, when grown in oxygen, and a = 10.13(6) Angstrom, when grown in argon. They are currently of interest as they are comprised of antiferromagnetically coupled magnetic moments residing on a network of corner-sharing tetrahedra, a system known to display the effects of geometrical frustration. Magnetic susceptibility measurements, with the applied field parallel to the growth direction were performed on both crystals. Both single crystal and polycrystalline samples showed very similar Curie-Weiss like behaviour down to 5 K, with Curie-Weiss temperatures, theta(ew) of approximately - 19 K. (C) 1998 Elsevier Science B.V. All rights reserved.

Item Type:	Journal Article
Subjects:	Q Science > QD Chemistry
Journal or Publication Title:	JOURNAL OF CRYSTAL GROWTH
Publisher:	ELSEVIER SCIENCE BV
ISSN:	0022-0248
Date:	August 1998
Volume:	191
Number:	4
Number of Pages:	6
Page Range:	pp. 740-745
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/15415

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