Static properties of cesium trifluoronickelate(I): comparison of numerical results, experimental data, and predictions from soliton-bearing models

T. Delica, W.J.M. Jonge, de, K. Kopinga, H. Leschke, H.J. Mikeska

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16 Citations (Scopus)
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Abstract

The numerical quantum transfer-matrix method has been applied to the s=1 easy-plane ferromagnetic chain system CsNiF3. A detailed analysis of experimental data on the static properties reveals that the generally accepted spin Hamiltonian for this compound gives an accurate description of the individual chains for J/kB=25 K and D/kB=7.7 K. At temperatures up to several degrees Kelvin above the three-dimensional ordering temperature, deviations between theory and experiment are found that are attributed to the coupling between the chains. A comparison of the quantum-transfer-matrix-method results with various analytical results supports the description of solitary excitations in CsNiF3 by the classical sine-Gordon model, extended to include spin fluctuations out of the easy plane and quantum effects.
Original languageEnglish
Pages (from-to)11773-11783
Number of pages11
JournalPhysical Review B: Condensed Matter
Volume44
Issue number21
DOIs
Publication statusPublished - 1991

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