Hyperfine magnetic fields investigation in CeInsub(3)
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2001
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RARE EARTHS'2001
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Rare earth and actinide metais, their alloys and intermetallic compounds are systems which generally present
exotic properties related to a Fermi liquid behavior of highly correlated electrons. The CeIn 3intermetallic compound,
with a cubic structure of the AuCu 3prototype, is one of these systems with a heavy fermion behaviour at low
temperatures, exhibiting an antifemamagnetic order below 10K. In the present work a nuclear spectroscopy, the Time
Differential Perturbed g-g Angular Correlation (TDPAC), was used to measure the magnetic hyperline field (MHF) at
both Ce and In sites in CeIn 3 . The 1111n(111 Cd) probe nucleus was used to investigate the In site, while the
140La(140Ce) probe nucleus was used to roeasure the MHF ai the Ce site. The samples were prepared by arc melting
the constituent elements in appropriate conditions. The resuits of TDPAC measurements at the In site below 10K
shcrived an electric field gradient (EFG) of 4.07x1017 V/cm2 and MHF increasing up to 0.2T; and a pare magnetic
interaction with MHF increasing up to 33T was observed at the Ce site. Also, in this case, the magnetization curve could
be adjusted to the function (1-T/TN)b , b » 0.36, which includes Mis compound as a tridimensional "Heisenberg
ferromagnet". The MHF at the Ce sites is dominated by the orbital contribution coming mostly from the 4f shell. As a
nésult of APWM method calcubtion, the contributions of the 4f orbital fields for Ce in the CeIn 3and for free Ce3 ions
are quite different indicating that the 4f shell of Ce exhibits a significant change inside the CeIn3 compound By other
lide, at the In position, both MHF and EFG originate from the 5p shelL The small value of MHF is due to different
energy as well as spatial distribution of spins in 5p sub-shells. The polarization of the 5p sub-shelis does not infiuence
the EFG, as it does not occur in the region important for the EFG formation.
Como referenciar
CARBONARI, A.W.; MESTNIK FILHO, J.; SAXENA, R.N.; LALIC, M.V.; SAITOVITCH, H.; SILVA, P.R.J. Hyperfine magnetic fields investigation in CeInsub(3). In: RARE EARTHS'2001, Sept. 22-26, 2001, Campos do Jordao, SP. Abstracts... p. 166. Disponível em: http://repositorio.ipen.br/handle/123456789/21118. Acesso em: 31 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.