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  Ferromagnetic fluctuations in YbNi4P2 measured by inelastic neutron scattering

Huesges, Z., Koza, M. M., Embs, J. P., Fennell, T., Simeoni, G., Geibel, C., et al. (2015). Ferromagnetic fluctuations in YbNi4P2 measured by inelastic neutron scattering. INTERNATIONAL CONFERENCE ON STRONGLY CORRELATED ELECTRON SYSTEMS 2014 (SCES2014), 012083. doi:10.1088/1742-6596/592/1/012083.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0026-C9E0-C Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002E-1360-7
Genre: Journal Article

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 Creators:
Huesges, Z.1, Author              
Koza, M. M.2, Author
Embs, J. P.2, Author
Fennell, T.2, Author
Simeoni, G.2, Author
Geibel, C.3, Author              
Krellner, C.2, Author
Stockert, O.4, Author              
Affiliations:
1Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              
2External Organizations, ou_persistent22              
3Christoph Geibel, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863465              
4Oliver Stockert, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863476              

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 Abstract: YbNi4P2 is one of the very few heavy-fermion systems which allow the study of ferromagnetic quantum criticality. The Curie temperature T-c=0.17 K can be suppressed by substituting arsenic on the phosphorus site, without changing the ferromagnetic nature of the ordered state. The ordered moment, even of the unsubstituted compound, is only around 0.05,LB, which hinders elastic neutron scattering experiments. To gain microscopic insight into the nature of the interactions, we have studied the magnetic excitations of polycrystalline YbNi4P2 by time-of-flight neutron spectroscopy. For momentum transfers larger than about 0.6 A-1 we find a quasi-elastic response whose width at low temperatures is limited by the Kondo effect. In contrast, the low-energy magnetic response is distinctly different for Q approaching zero: At low temperatures, but still in the paramagnetic phase, susceptibility and lifetime of the spin fluctuations are strongly enhanced, indicating the proximity of ferromagnetism.

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Language(s): eng - English
 Dates: 20152015-04-14
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
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Title: INTERNATIONAL CONFERENCE ON STRONGLY CORRELATED ELECTRON SYSTEMS 2014 (SCES2014)
Source Genre: Proceedings
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Publ. Info: -
Pages: - Volume / Issue: - Sequence Number: 012083 Start / End Page: - Identifier: ISSN: 1742-6588
ISBN: *****************

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Title: Journal of Physics: Conference Series
Source Genre: Journal
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Publ. Info: Bristol : IOP Publishing
Pages: - Volume / Issue: 592 Sequence Number: 012083 Start / End Page: 1 - 5 Identifier: ISSN: 1742-6588
CoNE: /journals/resource/111097776606042