Magnetic properties of a family of quinternary oxalates

Lhotel, E. et al. (2013) Magnetic properties of a family of quinternary oxalates. European Physical Journal B, 86, p. 248. (doi: 10.1140/epjb/e2013-30668-4)

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We report on the magnetic properties of four isomorphous compounds of a family of quinternary oxalates down to 60 mK. In all these materials, the magnetic Fe(II) ions with a strong magneto-crystalline anisotropy form a distorted kagome lattice, topologically equivalent to a perfect kagome one if nearest-neighbor interactions only are considered. All the compounds order at low temperature in an antiferromagnetic arrangement with magnetic moments at 120◦. A remarkable magnetic behavior emerges below the Neel temperature in three compounds (with inter-kagome-layer Zr, Sn, Fe but not with Al): the spin anisotropy combined with low exchange path network connectivity lead to domain walls intersecting the kagome planes through strings of free spins. These produce an unfamiliar slow spin dynamics in the ordered phase observed by AC susceptibility, evolving from exchange-released spin-flips towards a cooperative behavior on decreasing the temperature.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Price, Dr Daniel
Authors: Lhotel, E., Simonet, V., Ortloff, J., Canals, B., Paulsen, C., Suard, E., Hansen, T., Price, D.J., Wood, P.T., Powell, A.K., and Ballou, R.
Subjects:Q Science > QC Physics
Q Science > QD Chemistry
College/School:College of Science and Engineering > School of Chemistry
Journal Name:European Physical Journal B
ISSN (Online):1434-6036

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