Speaker
Dr
Rajendra Saxena
(Commisão Nacinal de Energia Nuclear IPEN-CNEN/SP)
Description
Investigation of hyperfine interactions in GdCrO3 perovskite oxide using PAC spectroscopy
Renilson A. da Silva, R.N. Saxena, A.W. Carbonari, G.A. Cabrera-Pasca
Instituto de Pesquisas Energéticas e Nucleares, IPEN-CNEN/SP, São Paulo, Brazil
Abstract
Perturbed angular correlation (PAC) measurements have been carried out in the anti-ferromagnetic GdCrO3 perovskite oxide using 111In (111Cd) and 181Hf(181Ta) nuclear probes. The radioactive parent nuclei 111In and 181Hf were introduced in the compound through a chemical process during sample preparation. The PAC measurements were carried out in the temperature range 20-300 K. Measurements with the 181Ta indicated a unique quadrupole interaction above 170 K and a combined electric quadrupole and magnetic dipole interactions below this temperature. The observed interactions were assigned to the probe nuclei substituting Cr sites in GdCrO3. Measurements with 111Cd showed two quadrupole interactions. Only one of the fractions however, showed a combined electric and magnetic interaction in the temperature rage 20-170 K which was assigned to 111Cd probe substituting Cr site. The other fraction was attributed to the Gd site. The present results are compared with those of LaCrO3 and NdCrO3.
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Primary author
Dr
Rajendra Saxena
(Commisão Nacinal de Energia Nuclear IPEN-CNEN/SP)
Co-authors
Dr
Artur Carbonari
(Commisão Nacinal de Energia Nuclear IPEN-CNEN/SP)
Mr
Gabriel Cabrera-Pasca
(Commisão Nacinal de Energia Nuclear IPEN-CNEN/SP)
Mr
Renilson da Silva
(Commisão Nacinal de Energia Nuclear IPEN-CNEN/SP)
