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Magnetic susceptibility and heat capacity measurements of single crystal TbMnO3

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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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Official URL: http://dx.doi.org/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:
DateEvent
27 May 2014Published
1 April 2014Accepted
15 January 2014Submitted
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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