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Magnetic ordering in the charge-ordered Nb12O29

Lappas, A., Waldron, J.E.L., Green, M.A., Prassides, K. (2002) Magnetic ordering in the charge-ordered Nb12O29. Physical Review B - Condensed Matter and Materials Physics, 65 (13). pp. 1344051-1344057. ISSN 0163-1829. (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)

Abstract

Magnetic susceptibility and zero-field muon spectroscopy (ZF-μ+SR) measurements of monoclinic Nb12O29 are reported. The magnetic susceptibility shows a broad maximum at around 12 K with no divergence between the zero-field cooled and field-cooled susceptibility, implying low-dimensional antiferromagnetic ordering. Application of the Bonner-Fischer model, applicable for a uniform S = 1/2 linear Heisenberg chain, gives an exchange energy of J/k = 12.71 K and substantially reduced g=0.556. In this magnetically dilute system, the observation of an oscillating signal in the ZF-μ+SR experiments is a clear and unambiguous signature of static magnetic correlations. We argue that this is due to an incommensurate arrangement of the Nb4+ electronic moments, similar to a spin-density wave. This phase sets in below Tfâ??10 K and produces spontaneous muon-spin precession associated with two distinct internal local fields that saturate at 39.3(6) and 138(1) G at 60 mK.

Item Type: Article
Additional information: Unmapped bibliographic data: LA - English [Field not mapped to EPrints] J2 - Phys. Rev. B Condens. Matter Mater. Phys. [Field not mapped to EPrints] AD - Royal Institution of Great Britain, 21 Albemarle Street, London W1X 4BS, United Kingdom [Field not mapped to EPrints] DB - Scopus [Field not mapped to EPrints]
Uncontrolled keywords: ferromagnetic material, niobium, oxide, acceleration, article, cooling, crystal structure, electron, elementary particle, energy, magnetic field, magnetism, model, oscillation, spectroscopy, surface charge
Subjects: Q Science > QC Physics > QC173.45 Condensed Matter
Q Science > QD Chemistry > QD478 Solid State Chemistry
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Giles Tarver
Date Deposited: 21 Oct 2015 14:21 UTC
Last Modified: 29 May 2019 16:11 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/51140 (The current URI for this page, for reference purposes)
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