| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Magnetic Orderings and Néel Temperature of TbNi2B2C |
| LIU Zhao-Sen1, Divis Martin2, Sechovský Vladimir2 |
| 1Faculty of Mathematics and Physics, Nanjing University of Information Science and Technology, Nanjing 2100442Department of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, 121 16 Prague 2, Czech Republic |
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| Cite this article: |
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LIU Zhao-Sen, Divis Martin, Sechovský et al 2009 Chin. Phys. Lett. 26 107504 |
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Abstract We employ a two-ion model to calculate the spontaneous magnetization and susceptibility of TbNi2B2C with the mean-field theory, and derive an analytic formula for the Néel temperature of the material with the perturbation theory. In both the cases, only the four lowest crystal-electric-field (CEF) states are taken into account as base functions. Our theoretical results are consistent with the experimental data, manifesting the strong effects of the low lying CEF states on the magnetic behaviors of the material and the
suitability of the theoretical approach proposed here.
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| Keywords:
75.10.Dg
75.10.-b
75.50.Ee
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Received: 25 June 2009
Published: 27 September 2009
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| PACS: |
75.10.Dg
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(Crystal-field theory and spin Hamiltonians)
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75.10.-b
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(General theory and models of magnetic ordering)
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75.50.Ee
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(Antiferromagnetics)
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