O’Flynn, D., Lees, Martin R. and Balakrishnan, Geetha (2014) Magnetic susceptibility and heat capacity measurements of single crystal TbMnO3. Journal of Physics: Condensed Matter, Volume 26 (Number 25). Article number 256002. doi:10.1088/0953-8984/26/25/256002

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Abstract

Measurements of the magnetic susceptibility χ and heat capacity C on single crystals of the multiferroic TbMnO3 are presented. A non-magnetic isostructural compound, LaGaO3, was used to isolate the magnetic component of the heat capacity. An anisotropic magnetic susceptibility, deviations from Curie-Weiss behaviour and a significant magnetic entropy above the antiferromagnetic ordering temperature TN1 = 41 K are attributed to a combination of crystal-field effects and short-range order between the Mn moments. Heat capacity in a magnetic field applied along the a axis confirms the saturation of Tb3+ moments in 90 kOe. A hyperfine contribution from the Tb and Mn nuclear moments that may be convolved with a contribution from low-lying Tb crystal-field levels leads to a low-temperature rise in C(T)/T.

Item Type:	Journal Article
Divisions:	Faculty of Science > Physics
Journal or Publication Title:	Journal of Physics: Condensed Matter
Publisher:	Institute of Physics Publishing Ltd.
ISSN:	0953-8984
Official Date:	27 May 2014
Dates:	Date Event 27 May 2014 Published 1 April 2014 Accepted 15 January 2014 Submitted
Volume:	Volume 26
Number:	Number 25
Article Number:	Article number 256002
DOI:	10.1088/0953-8984/26/25/256002
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access

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