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Magnetic order in geometrically frustrated Gd_{2}(Ti_{1-x}Zr_{x})_{2}O_{7} (x=0.02 and 0.15) single crystals

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Liao, Da-Qian, Leeson, Mark S., Baker, Daniel William, Paul, Don McK. and Balakrishnan, Geetha (2011) Magnetic order in geometrically frustrated Gd_{2}(Ti_{1-x}Zr_{x})_{2}O_{7} (x=0.02 and 0.15) single crystals. Physical Review B (Condensed Matter and Materials Physics), Volume 83 (Number 6). article no.064403 . doi:10.1103/PhysRevB.83.064403

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Official URL: http://dx.doi.org/10.1103/PhysRevB.83.064403

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Abstract

Single crystals of Gd(2)(Ti(1-x)Zr(x))(2)O(7) with x = 0.02 and 0.15 have been used to investigate the effects of Zr doping on the properties of the geometrically frustrated antiferromagnet Gd(2)Ti(2)O(7). Powder and single-crystal x-ray data, along with optical birefringence measurements, reveal that the x = 0.02 sample retains the cubic Fd (3) over barm structure of pure Gd(2)Ti(2)O(7), while the x = 0.15 composition adopts a tetragonal I4(1)/amd structure. Low-temperature magnetization and specific heat measurements show that for Gd(2)(Ti(0.98)Zr(0.02))(2)O(7) there are two magnetic transitions at T(N1) = 1.02 K and T(N2) = 0.70 K, but for Gd(2)(Ti(0.85)Zr(0.15))(2)O(7) a single transition is observed at T(N1) = 1.02 K. Changes in the specific heat with a magnetic field applied along the [110] and the [111] directions are used to construct the H-T phase diagrams for both samples.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Q Science > QD Chemistry
Divisions: Faculty of Science, Engineering and Medicine > Engineering > Engineering
Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH): Gadolinium -- Magnetic properties, Metal crystals -- Magnetic properties, Antiferromagnetism, Rare earths -- Magnetic properties, Crystallography, X-rays -- Diffraction
Journal or Publication Title: Physical Review B (Condensed Matter and Materials Physics)
Publisher: American Physical Society
ISSN: 1098-0121
Official Date: 2011
Dates:
DateEvent
2011Published
Volume: Volume 83
Number: Number 6
Page Range: article no.064403
DOI: 10.1103/PhysRevB.83.064403
Status: Peer Reviewed
Publication Status: Published
Funder: Engineering and Physical Sciences Research Council (EPSRC), European Regional Development Fund (ERDF), Advantage West Midlands (AWM)

Data sourced from Thomson Reuters' Web of Knowledge

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