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Titolo:
Studies of implanted muons in organic radicals
Autore:
Valladares, RM; Fisher, AJ; Blundell, SJ; Hayes, W;
Indirizzi:
Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, England Univ Oxford Oxford England OX1 3PU larendon Lab, Oxford OX1 3PU, England Natl Autonomous Univ Mexico, Fac Ciencias, Dept Fis, Mexico City 04510, DF, Natl Autonomous Univ Mexico Mexico City DF Mexico 04510 o City 04510, DF, Univ London Univ Coll, Dept Phys & Astron, London WC1E 6BT, England Univ London Univ Coll London England WC1E 6BT , London WC1E 6BT, England
Titolo Testata:
JOURNAL OF PHYSICS-CONDENSED MATTER
fascicolo: 47, volume: 10, anno: 1998,
pagine: 10701 - 10713
SICI:
0953-8984(19981130)10:47<10701:SOIMIO>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
FERROMAGNETIC INTERMOLECULAR INTERACTION; NITROPHENYL NITRONYL NITROXIDE; EFFECTIVE EXCHANGE INTEGRALS; BETA-PHASE; P-NPNN; CONDUCTING POLYMERS; CLUSTERS; CRYSTAL; DENSITY; DEFECTS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
34
Recensione:
Indirizzi per estratti:
Indirizzo: Valladares, RM Univ Oxford, Dept Phys, Clarendon Lab, Parks Rd, Oxford OX13PU, England Univ Oxford Parks Rd Oxford England OX1 3PU 1 3PU, England
Citazione:
R.M. Valladares et al., "Studies of implanted muons in organic radicals", J PHYS-COND, 10(47), 1998, pp. 10701-10713

Abstract

We have performed semi-empirical molecular dynamics calculations of the electronic and molecular structure of muonium(=mu(+)e(-)) incorporated into the organic radicals 3-quinolyl nitronyl nitroxide (3-QNNN), para-pyridyl nitronyl nitroxide (p-PYNN), phenyl nitronyl nitroxide (PNN) and para-nitrophenyl nitronyl nitroxide (p-NPNN). These materials are of interest because they show ferromagnetic order at very low temperatures and can be effectively studied using implanted positive muons. Our calculations give evidence for a wide variety of possible muonium binding sites in the conjugated ring systems of the materials as well as in the nitronyl nitroxide group and suggest the formation of local spin triplet as well as singlet states near the muon, a result which is supported by recent experiments.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/09/20 alle ore 03:47:25