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Magnetisation studies of geometrically frustrated antiferromagnets SrLn2 O4, with Ln= Er, Dy, and Ho

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Hayes, Thomas J., Young, Olga, Balakrishnan, Geetha and Petrenko, O. A.. (2012) Magnetisation studies of geometrically frustrated antiferromagnets SrLn2 O4, with Ln= Er, Dy, and Ho. Journal of the Physical Society of Japan, Vol.81 (No.2). 024708. ISSN 0031-9015

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Abstract

We present the results of susceptibility χ(T) and magnetisation M(H) measurements performed on single crystal samples of the rare-earth oxides SrLn2O4 (Ln = Er, Dy, and Ho). The measurements reveal the presence of a magnetic ordering transition in SrHo2O4 at 0.62 K and confirm that SrEr2O4 orders magnetically at 0.73 K, while in SrDy2O4 such a transition is absent down to at least 0.5 K. The observed ordering temperatures are significantly lower than the Curie–Weiss temperatures, θCW, obtained from the high-temperature linear fits to the 1/χ(T) curves, which implies that these materials are subject to geometric frustration. Strong anisotropy found in the χ(T) curves for a field applied along the different crystallographic directions is also evident in the M(H) curves measured both above and below the ordering temperatures. For all three compounds the magnetisation plateaux at approximately one third of the magnetisation saturation values can be seen for certain directions of applied field, which is indicative of field-induced stabilisation of a collinear two-up one-down structure. ©2012 The Physical Society of Japan

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Physics
Journal or Publication Title: Journal of the Physical Society of Japan
Publisher: Physical Society of Japan
ISSN: 0031-9015
Official Date: February 2012
Volume: Vol.81
Number: No.2
Page Range: 024708
Identification Number: 10.1143/JPSJ.81.024708
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
URI: http://wrap.warwick.ac.uk/id/eprint/48031

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