%0 Journal Article %1 WOS:000240883500022 %A de la Presa, P %A Forker, M %A Cavalcante, Th. J %A Ayala, A P %C PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS %D 2006 %I ELSEVIER SCIENCE BV %J JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS %K C15 angular compounds; correlations} crystal field hyperfine interaction; laves-phase perturbed {magnetic %N 2 %P 292-297 %R 10.1016/j.jmmm.2006.03.029 %T Spin and temperature dependence of the magnetic hyperfine field of Cd-111 in the rare earth-aluminum Lavesphase compounds RAl2 %V 306 %X Perturbed angular correlation spectroscopy has been used to investigate the combined magnetic and electric hyperfine interaction of the probe nucleus Cd-111 in ferromagnetically ordered rare earth (R)-dialuminides RAl2 as a function of temperature for the rare earth constituents R = Pr, Nd, Sm, Eu, Tb, Dy, Ho and Er. In compounds with two magnetically non-equivalent Al sites (R = Sm, Tb, Ho, Er), the magnetic hyperfine field was found to be strongly anisotropic. This anisotropy is much greater than the anisotropic dipolar fields, suggesting a contribution of the anisotropic 4f-electron density to magnetic hyperfine field at the closed-shell probe nucleus. The spin dependence of the magnetic hyperfine field reflects a decrease of the effective exchange parameter of the indirect coupling with increasing R atomic number. For the compounds with the R constituents R = Pr, Nd, Tb, Dy and Ho the parameters B-4, B-6 of the interaction of the crystal field interaction have been determined from the temperature dependence of the magnetic hyperfine field. The Cd-111 PAC spectrum of EuAl2 at 9 K confirms the antiferromagnetic structure of this compound. (C) 2006 Elsevier B.V. All rights reserved.

@article{WOS:000240883500022, abstract = {Perturbed angular correlation spectroscopy has been used to investigate the combined magnetic and electric hyperfine interaction of the probe nucleus Cd-111 in ferromagnetically ordered rare earth (R)-dialuminides RAl2 as a function of temperature for the rare earth constituents R = Pr, Nd, Sm, Eu, Tb, Dy, Ho and Er. In compounds with two magnetically non-equivalent Al sites (R = Sm, Tb, Ho, Er), the magnetic hyperfine field was found to be strongly anisotropic. This anisotropy is much greater than the anisotropic dipolar fields, suggesting a contribution of the anisotropic 4f-electron density to magnetic hyperfine field at the closed-shell probe nucleus. The spin dependence of the magnetic hyperfine field reflects a decrease of the effective exchange parameter of the indirect coupling with increasing R atomic number. For the compounds with the R constituents R = Pr, Nd, Tb, Dy and Ho the parameters B-4, B-6 of the interaction of the crystal field interaction have been determined from the temperature dependence of the magnetic hyperfine field. The Cd-111 PAC spectrum of EuAl2 at 9 K confirms the antiferromagnetic structure of this compound. (C) 2006 Elsevier B.V. All rights reserved.}, added-at = {2022-05-23T20:00:14.000+0200}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, author = {de la Presa, P and Forker, M and Cavalcante, Th. J and Ayala, A P}, biburl = {https://www.bibsonomy.org/bibtex/292988767ebbe462a2f232dcfbd2cbcf3/ppgfis_ufc_br}, doi = {10.1016/j.jmmm.2006.03.029}, interhash = {3f87d256073fecc5560082ea35533276}, intrahash = {92988767ebbe462a2f232dcfbd2cbcf3}, issn = {0304-8853}, journal = {JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS}, keywords = {C15 angular compounds; correlations} crystal field hyperfine interaction; laves-phase perturbed {magnetic}, number = 2, pages = {292-297}, publisher = {ELSEVIER SCIENCE BV}, pubstate = {published}, timestamp = {2022-05-23T20:00:14.000+0200}, title = {Spin and temperature dependence of the magnetic hyperfine field of Cd-111 in the rare earth-aluminum Lavesphase compounds RAl2}, tppubtype = {article}, volume = 306, year = 2006 }