Classical and quantum magnetism in giant keplerate magnetic molecules
| Autor(en): | Muller, A Luban, M Schroder, C Modler, R Kogerler, P Axenovich, M Schnack, J Canfield, PC Bud'ko, S Harrison, N |
Stichwörter: | cage compounds; CENTERS; Chemistry; Chemistry, Physical; cluster compounds; CLUSTERS; CRYSTAL; DYNAMICS; HEISENBERG-MODEL; magnetic properties; Physics; Physics, Atomic, Molecular & Chemical; polyoxometalates; SPHERES; SPIN; TEMPERATURE; topology; UNITS | Erscheinungsdatum: | 2001 | Herausgeber: | WILEY-V C H VERLAG GMBH | Journal: | CHEMPHYSCHEM | Volumen: | 2 | Ausgabe: | 8-9 | Startseite: | 517+ | Zusammenfassung: | What might be effective for understanding the magnetism of emerging mesoscopic magnetic molecules? Three theoretical modelling methods successfully explain the experimental data on the largest paramagnet synthesized to date, the nano-sized Keplerate {Mo-VI(72) Fe-III(30)}. Surprisingly, this molecule follows the classical Heisenberg model even down to as low as 50 mK and its 30 spins exhibit highly symmetric order at low temperatures. Nearest-neighbor spin vectors (see picture) are canted by an external magnetic field while their projections maintain a frustration angle of 120 degrees. |
ISSN: | 14394235 | DOI: | 10.1002/1439-7641(20010917)2:8/9<517::AID-CPHC517>3.0.CO;2-1 |
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geprüft am 20.05.2024
