Magnetic interactions at Ce impurities in REMn2Ge2 (RE = La, Ce, Pr, Nd) compounds
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2018
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Physica B: Condensed Matter
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In the work reported in this paper, the temperature dependence of the magnetic hyperfine field (Bhf) at 140Ce
nuclei replacing Pr atoms in PrMn2Ge2 compound was measured by the perturbed angular correlation technique
to complete the sequence of measurements in REMn2Ge2 (RE = La, Ce, Pr, Nd). Results show an anomalous
behavior different from the expected Brillouin curve. A model was used to fit the data showing that the Ce
impurity contribution (Bimp
hf
) to Bhf is negative for NdMn2Ge2 below 210 K. The impurity contribution (Bimp
hf
) at
0 K for all compounds is much smaller than that for the free Ce3+, showing that the 4f band of Ce is more likely
highly hybridized with 5d band of the host. Results show that direction of the localized magnetic moment at Mn
atoms strongly affects the exchange interaction at Ce impurities.
Como referenciar
BOSCH-SANTOS, B.; CABRERA-PASCA, G.A.; SAXENA, R.N.; BURIMOVA, A.N.; CARBONARI, A.W. Magnetic interactions at Ce impurities in REMn2Ge2 (RE = La, Ce, Pr, Nd) compounds. Physica B: Condensed Matter, v. 536, p. 137-141, 2018. DOI: 10.1016/j.physb.2017.10.047. Disponível em: http://repositorio.ipen.br/handle/123456789/28531. Acesso em: 28 Feb 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.