Artículos de revistas
Magnetic Structure And Enhanced Tn Of The Rare-earth Intermetallic Compound Tbrh In5: Experiments And Mean-field Model
Registro en:
Physical Review B - Condensed Matter And Materials Physics. , v. 74, n. 21, p. - , 2006.
10980121
10.1103/PhysRevB.74.214404
2-s2.0-33845287972
Autor
Lora-Serrano R.
Giles C.
Granado E.
Garcia D.J.
Miranda E.
Aguero O.
Mendonca Ferreira L.
Duque J.G.S.
Pagliuso P.G.
Institución
Resumen
In this work the physical properties of the intermetallic compound TbRh In5 were investigated by means of temperature-dependent magnetic susceptibility, electrical resistivity, heat-capacity, and resonant x-ray magnetic diffraction experiments. TbRh In5 is an intermetallic compound that orders antiferromagnetically at TN =45.5 K, the highest ordering temperature among the existing RRh In5 (1-1-5, R=rare earth) materials, which in contrast to what is expected from a de Gennes scaling along the RRh In5 series. The x-ray resonant diffraction data have allowed us to solve the magnetic structure of TbRh In5. Below TN, we found a commensurate antiferromagnetic structure with a propagation vector (12,0,12) and the Tb moments oriented along the c axis. Strong (over two orders of magnitude) dipolar enhancements of the magnetic Bragg peaks were observed at both Tb absorption edges LII and LIII, indicating a fairly high polarization of the Tb 5d levels. Using a mean-field model including an isotropic first-neighbor exchange interaction (JR-R) and the tetragonal crystalline electrical field (CEF), we evaluate the influence of the CEF effects in the physical properties of TbRh In5. The results reported here seem to corroborate a general trend of CEF-driven effects on TN along the RRh In5 series. © 2006 The American Physical Society. 74 21
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