Investigation of the local magnetism at rare-earth sites in RAg(R=rare-earth) intermetallic compounds using perturbed gamma-gamma angular correlation spectroscopy
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2005
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INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE; ENCONTRO NACIONAL DE APLICACOES NUCLEARES, 7th
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Time differential perturbed gamma-gamma angular correlation (TDPAC) technique was used to measure the
magnetic hyperfine field (mhf) at rare earth sites in intermetallic compounds RAg (R = Dy, Gd, Ho, Nd, Tb) in
order to study the behavior of the mhf with 4f-electron density variation. 140Ce was used as probe nuclei in the
TDPAC measurements, which was carried out in the temperature range of 10 K to 300 K. The results of the
temperature dependence of the mhf show a standard antiferromagnetic behavior below the magnetic order
temperature but, for lower temperatures, it was observed a sharp deviation from the expected Brillouin-like
behavior with an increase of the mhf values. The values of the mhf for each compound at the lowest
temperature just above the deviation were compared to the respective projection of the rare-earth spin on the
total angular momentum J. The results showed to follow a similar behavior when compared to those for the
magnetic moment of the compounds.
Como referenciar
CAVALCANTE, F.H.M.; CARBONARI, A.W.; MESTNIK FILHO, J.; PEREIRA, L.F.D.; SAXENA, R.N.; OLIVEIRA, A.J.A.; SOUZA, P.E.N.; SANTOS, A.O. Investigation of the local magnetism at rare-earth sites in RAg(R=rare-earth) intermetallic compounds using perturbed gamma-gamma angular correlation spectroscopy. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE; ENCONTRO NACIONAL DE APLICACOES NUCLEARES, 7th, ago. 28 - set. 2, 2005, Santos, SP. Anais... Disponível em: http://repositorio.ipen.br/handle/123456789/17656. Acesso em: 12 May 2024.
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