Lieb-Mattis Model for Two Interpenetrating Antiferromagnets |
| D. Schmalfuss, S.E. Krüger and J. Richter Institut für Theoretische Physik, Universität Magdeburg, PF 4120, 39016 Magdeburg, Germany |
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| We investigate a frustrated Lieb-Mattis-like spin-1/2 model that is a reference model for the corresponding square-lattice Heisenberg model describing the unusual magnetic properties of Ba2Cu3O4Cl2. Due to frustration we obtain a rich magnetic phase diagram. We find two critical temperatures in accordance with recent experiments on Ba2Cu3O4Cl2. |
| DOI: 10.12693/APhysPolA.97.377 PACS numbers: 75.10.Jm |