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Titolo:
THEORETICAL-STUDIES OF IMPLANTED MUONS IN ORGANIC MAGNETS
Autore:
VALLADARES RM; PROBERT MIJ; FISHER AJ;
Indirizzi:
UNIV DURHAM,DEPT PHYS,SOUTH RD DURHAM DH1 3LE ENGLAND UNIV DURHAM,DEPT PHYS DURHAM DH1 3LE ENGLAND UNIV OXFORD,CLARENDON LAB OXFORD OX1 3PU ENGLAND
Titolo Testata:
Materials science & engineering. B, Solid-state materials for advanced technology
fascicolo: 1-3, volume: 37, anno: 1996,
pagine: 247 - 250
SICI:
0921-5107(1996)37:1-3<247:TOIMIO>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
FERROMAGNETIC INTERMOLECULAR INTERACTION; CRYSTAL;
Keywords:
IMPLANTED MUONS; ORGANIC MAGNETS; ELECTRONIC STATES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
12
Recensione:
Indirizzi per estratti:
Citazione:
R.M. Valladares et al., "THEORETICAL-STUDIES OF IMPLANTED MUONS IN ORGANIC MAGNETS", Materials science & engineering. B, Solid-state materials for advanced technology, 37(1-3), 1996, pp. 247-250

Abstract

Wholly organic ferromagnets are a new class of materials of great potential interest, but the early examples exhibit only very weak magnetic order at very low temperatures (M. Tamura et al., Chem. Phys. Lett.,186 (1991) 401). In these circumstances, muon spin rotation (mu tSR) is among the most sensitive sources of information about the magnetic structure and interactions on a molecular scale (F.L. Pratt et al., Synthetic Metals, 61 (1993) 171). However, interpretation of the mu SR data is complicated because of the large number of binding sites made possible by the relatively complicated molecular structure. We have performed semi-empirical and ab initio density functional calculations ofthe electronic and molecular structure of muonium incorporated into the organic ferromagnets par alpha-nitrophenyl a-nitronyl nitroxide (p-NPNN), 3-quinolyl nitronyl nitroxide (3-QNNN) and para-pyridyl nitronyl nitroxide (p-PYNN). We find evidence for a wide variety of possible muon binding sites including sites in the conjugated ring systems of the materials as well as in the nitronyl nitroxide group. Our calculations also suggest the formation of local triplet electronic states nearthe muon within the spin-1/2 magnetic system.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/11/20 alle ore 08:35:19