Measurement of quadrupole interactions in Lasub(1-x)Srsub(x)CoOsub(3) Perovskites using TDPAC technique
Carregando...
Data
Data de publicação
Orientador
Título da Revista
ISSN da Revista
Título do Volume
É parte de
É parte de
É parte de
Hyperfine Interactions
Exportar
Resumo
The Perturbed Angular Correlation (PAC) technique was used to study the quadrupole
interactions in the La1 j xSrxCoO3 (0 e x e 0.08) perovskites using 111Cd and 181Ta probes. The
radioactive parent nuclei 111In and 181Hf were introduced in the oxide lattice through chemical
process during sample preparation and found to occupy only Co sites. The measurements cover a
temperature range from 10 to 1150 K except the pure LaCoO3 for which an additional
measurement was made at 4.2 K. The measured quadrupole frequencies were found to decrease
linearly with increasing temperature as well as with increasing Sr concentration. Temperature
dependence of quadrupole frequency in the pure LaCoO3 shows small discontinuities around
70Y90 K and 500Y600 K which have been atributed to thermally activated spin state transitions,
from the low-spin (LS) ground state electronic configuration of Co+3 ion to the intermediate-spin
(IS) state and from intermediate-spin (IS) state to high-spin (HS) state respectively, observed in
some recent studies.
Como referenciar
JUNQUEIRA, A.C.; CARBONARI, A.W.; SAXENA, R.N.; MESTNIK FILHO, JOSE; DOGRA, R. Measurement of quadrupole interactions in Lasub(1-x)Srsub(x)CoOsub(3) Perovskites using TDPAC technique. Hyperfine Interactions, v. 158, p. 401-405, 2004. DOI: 10.1007/s10751-005-9066-7. Disponível em: http://repositorio.ipen.br/handle/123456789/5662. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.