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Titolo:
High-field torque magnetometry on Fe-6 and Fe-10 molecular magnets
Autore:
Cornia, A; Jansen, AGM; Affronte, M;
Indirizzi:
Univ Modena, Dipartimento Chim, I-41100 Modena, Italy Univ Modena ModenaItaly I-41100 ipartimento Chim, I-41100 Modena, Italy CNRS, Grenoble High Magnet Field Lab, F-38042 Grenoble 9, France CNRS Grenoble France 9 High Magnet Field Lab, F-38042 Grenoble 9, France Univ Modena, INFM, I-41100 Modena, Italy Univ Modena Modena Italy I-41100 niv Modena, INFM, I-41100 Modena, Italy Univ Modena, Dipartimento Fis, I-41100 Modena, Italy Univ Modena Modena Italy I-41100 Dipartimento Fis, I-41100 Modena, Italy
Titolo Testata:
MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS
, volume: 334, anno: 1999,
parte:, 2
pagine: 1113 - 1123
SICI:
1058-725X(1999)334:<1113:HTMOFA>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
IRON(III) IONS; RINGS; CRYSTAL;
Keywords:
iron clusters; high magnetic fields; magnetic anisotropy; torque magnetometry;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
13
Recensione:
Indirizzi per estratti:
Indirizzo: Cornia, A Univ Modena, Dipartimento Chim, Via G Campi 183, I-41100 Modena,Italy Univ Modena Via G Campi 183 Modena Italy I-41100 Modena, Italy
Citazione:
A. Cornia et al., "High-field torque magnetometry on Fe-6 and Fe-10 molecular magnets", MOL CRYST A, 334, 1999, pp. 1113-1123

Abstract

We have applied torque magnetometry to the study of magnetic anisotropy insix- and ten-membered rings of iron(III) ions. By using magnetic fields upto 23 Tesla, we have partially overriden the intramolecular antiferromagnetic ordering of the spins (J = 20.0 cm(-1) 9.6 cm(-1) in Fe-6 and Fe-10, respectively) to obtain magnetic ground states with S = 1, 2, 3, etc.. Torquemeasurements on microgram single crystals at temperatures down to 0.45 K have shown that spin-flip transitions are accompanied by sharp Variations ofmagnetic anisotropy. The angular dependence of transition fields has provided spectroscopic-quality information about the spin-Hamiltonian parametersin the two compounds. In addition, by analyzing the field dependence of the torque signal we have determined the exchange energies and zero-field splitting parameters of the total-spin multiplets with S less than or equal to5 in the Fe-10 sample. We conclude that torque magnetometry represents a high-sensitivity, powerful technique for studying field-induced level crossing in molecular magnets.

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Documento generato il 08/07/20 alle ore 07:45:50