| Issue |
J. Phys. Colloques
Volume 49, Number C8, Décembre 1988
Proceedings of the International Conference on Magnetism
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|
|---|---|---|
| Page(s) | C8-1451 - C8-1452 | |
| DOI | https://doi.org/10.1051/jphyscol:19888666 | |
Proceedings of the International Conference on Magnetism
J. Phys. Colloques 49 (1988) C8-1451-C8-1452
DOI: 10.1051/jphyscol:19888666
1 Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
2 Netherlands Energy Research Foundation ECN, P.O. Box 1, 1755 ZG Petten, The Netherlands.
3 Institute for Applied Mathematics, University of Antwerp, B 2020 Antwerp, Belgium.
4 Institute for Theoretical Physics, University of Leuven, B 3030 Leuven, Belgium (on leave from Instytut Fizyki, Uniwersytet im. A. Mickiewicza, 60-769 Poznan, Poland).
J. Phys. Colloques 49 (1988) C8-1451-C8-1452
DOI: 10.1051/jphyscol:19888666
COMPARISON BETWEEN EXPERIMENTS AND NUMERICAL CALCULATIONS ON S = 1/2 HEISENBERG-XY FERROMAGNETIC CHAINS
K. Kopinga1, J. Emmen1, G. C. de Vries2, L. F. Lemmens3 et G. Kamieniarz41 Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
2 Netherlands Energy Research Foundation ECN, P.O. Box 1, 1755 ZG Petten, The Netherlands.
3 Institute for Applied Mathematics, University of Antwerp, B 2020 Antwerp, Belgium.
4 Institute for Theoretical Physics, University of Leuven, B 3030 Leuven, Belgium (on leave from Instytut Fizyki, Uniwersytet im. A. Mickiewicza, 60-769 Poznan, Poland).
Abstract
Heat capacity measurements in fields 0 ≤ B ≤ 3 T were performed on [C6H11NH3] CuBr3 (CHAB), an excellent ferromagnetic S = 1/2 chain system with 5 % XY anisotropy. A comparison of the data on ƊC = C (B) - C (0) with extrapolations of numerical results for finite chains reveals systematic deviations at low temperatures, which are attributed to the limited chain lengths (up to 11 spins) used in the computations.