Magnetic field at sup(140)Ce in Dy sites in DyX (X=Cu, Ag) compounds studied by perturbed angular correlation spectroscopy
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Journal of Magnetism and Magnetic Materials
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The magnetic hyperfine field (mhf) at Dy sites in DyAg and DyCu was investigated with perturbed gamma–gamma angular correlation
technique using 140La–140Ce probe nuclei. The temperature dependence of the observed mhf shows a deviation from an expected
Brillouin-like behavior with a sharp increase of mhf values for temperatures below approximately half of TN for each compound. This
additional magnetic interaction is believed to result from the polarization of Ce spin moments induced by the magnetic field from Dy
atoms. The experimental results for the temperature dependence of mhf are fitted by using a model based in the molecular field theory.
The results are discussed in terms of the RKKY model for the indirect magnetic coupling between the magnetic Dy ions.
r 2008 Elsevier B.V. All rights reserved.
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CARBONARI, A.W.; CAVALCANTE, F.H.M.; PEREIRA, L.F.D.; CABRERA PASCA, G.A.; MESTNIK FILHO, J.; SAXENA, R.N. Magnetic field at sup(140)Ce in Dy sites in DyX (X=Cu, Ag) compounds studied by perturbed angular correlation spectroscopy. Journal of Magnetism and Magnetic Materials, v. 320, n. 14, p. e478-e480, 2008. DOI: 10.1016/j.jmmm.2008.02.172. Disponível em: http://repositorio.ipen.br/handle/123456789/4963. Acesso em: 30 Dec 2025.
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