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Magnetic excitations in the ordered phases of praseodymium hexaboride

Le, M.D.; McEwen, K.A.; Park, J.-G.; Lee, S.; Iga, F.; Rule, K.C.; (2008) Magnetic excitations in the ordered phases of praseodymium hexaboride. Journal of Physics Condensed Matter , 20 (10) p. 104231. 10.1088/0953-8984/20/10/104231. Green open access

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Abstract

We have made the first inelastic neutron scattering measurements on single crystal PrB6, studying the magnetic excitations in the ordered phases. The lowest energy mode has a minimum energy of ≈1.0 meV at the magnetic zone centre, with a significant dispersion along the [001] direction, but very little dispersion along [110]. Interactions out to fourth nearest neighbours are required to explain the [001] dispersion. Measurements of the temperature dependence of the excitations show a strong softening and broadening of the lowest energy mode at the magnetic zone centre between 2 K (commensurate phase) and 5 K (incommensurate phase).

Type: Article
Title: Magnetic excitations in the ordered phases of praseodymium hexaboride
Open access status: An open access version is available from UCL Discovery
DOI: 10.1088/0953-8984/20/10/104231
Publisher version: http://dx.doi.org/10.1088/0953-8984/20/10/104231
Language: English
UCL classification: UCL > School of BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Physics and Astronomy
URI: http://discovery.ucl.ac.uk/id/eprint/8233
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