Cu3V2O8: magnetic ordering in a spin-1/2 Kagom -staircase lattice
| Autor: | N. Rogado, M. K. Haas, David A. Huse, Gavin Lawes, Robert J. Cava, A. P. Ramirez |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Materials science
Curie–Weiss law Spins Condensed matter physics media_common.quotation_subject Condensed Matter (cond-mat) FOS: Physical sciences Frustration Condensed Matter Condensed Matter Physics Magnetization Ferromagnetism Antiferromagnetism Condensed Matter::Strongly Correlated Electrons General Materials Science Grain boundary Anisotropy media_common |
| Zdroj: | Journal of Physics: Condensed Matter. 15:907-914 |
| ISSN: | 0953-8984 |
| DOI: | 10.1088/0953-8984/15/6/317 |
| Popis: | The spin-1/2 Cu2+ ions in beta-Cu3V2O8 occupy the sites of a Kagome-staircase lattice, an anisotropic variant of the Kagome net: buckled layers and imbedded plaquettes of three edge-shared CuO4 squares break the ideal Kagome symmetry. Susceptibility and heat capacity measurements show the onset of short-range ordering at approximately 75 K, and a magnetic phase transition with the characteristics of antiferromagnetism at ~29 K. Comparison to the Curie Weiss theta (theta,CW = -135 K) indicates that the geometric frustration is largely relieved by the anisotropy. A ferromagnetic contribution to the magnetization below the ordering temperature and negative magnetization in zero-field cooled measurements at low fields are attributed to uncompensated spins at grain boundaries or defects. Comment: 9 pages, 5 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|