dorsal/arxiv
View SchemaNoncollinear magnetic ordering in small Chromium Clusters
| Authors | C. Kohl, G. F. Bertsch |
|---|---|
| Categories | |
| ArXiv ID | physics/9902047 |
| URL | https://arxiv.org/abs/physics/9902047 |
| DOI | 10.1103/PhysRevB.60.4205 |
Abstract
We investigate noncollinear effects in antiferromagnetically coupled clusters using the general, rotationally invariant form of local spin-density theory. The coupling to the electronic degrees of freedom is treated with relativistic non-local pseudopotentials and the ionic structure is optimized by Monte-Carlo techniques. We find that small chromium clusters (N \le 13) strongly favor noncollinear configurations of their local magnetic moments due to frustration. This effect is associated with a significantly lower total magnetization of the noncollinear ground states, ameliorating the disagreement between Stern-Gerlach measurements and previous collinear calculations for Cr_{12} and Cr_{13}. Our results further suggest that the trend to noncollinear configurations might be a feature common to most antiferromagnetic clusters.
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"abstract": "We investigate noncollinear effects in antiferromagnetically coupled clusters\nusing the general, rotationally invariant form of local spin-density theory.\nThe coupling to the electronic degrees of freedom is treated with relativistic\nnon-local pseudopotentials and the ionic structure is optimized by Monte-Carlo\ntechniques. We find that small chromium clusters (N \\le 13) strongly favor\nnoncollinear configurations of their local magnetic moments due to frustration.\nThis effect is associated with a significantly lower total magnetization of the\nnoncollinear ground states, ameliorating the disagreement between Stern-Gerlach\nmeasurements and previous collinear calculations for Cr_{12} and Cr_{13}. Our\nresults further suggest that the trend to noncollinear configurations might be\na feature common to most antiferromagnetic clusters.",
"arxiv_id": "physics/9902047",
"authors": [
"C. Kohl",
"G. F. Bertsch"
],
"categories": [
"physics.atm-clus"
],
"doi": "10.1103/PhysRevB.60.4205",
"title": "Noncollinear magnetic ordering in small Chromium Clusters",
"url": "https://arxiv.org/abs/physics/9902047"
},
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