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Title: Antiferromagnetic exchange weakening in the TbRhIn5 intermetallic system with Y-substitution
Authors: Amaral, RP
Lora-Serrano, R
Garcia, DJ
Iwamoto, WA
Betancourth, D
Cadogan, JM
Muñoz-Pérez, S
Avdeev, M
Cobas-Acosta, R
Bittar, EM
Duque, JGS
Pagliuso, PG
Keywords: Magnetic properties
Thermodynamic properties
Neutron diffraction
Specific heat
Monoclinic lattices
Magnetic susceptibility
Magnetic moments
Issue Date: 1-Jul-2018
Publisher: Elsevier
Citation: Amaral, R. P., Lora-Serrano, R., Garcia, D. J., Iwamoto, W. A., Betancourth, D., Cadogan, J. M., Muñoz-Pérez, S., Avdeev, M., Cobas-Acosta, R., Bittar, E. M., Duque, J. G. S., & Pagliuso, P. G. (2018). Antiferromagnetic exchange weakening in the TbRhIn5 intermetallic system with Y-substitution. Intermetallics, 98, 161-168. doi:10.1016/j.intermet.2018.04.016
Abstract: We report measurements of the temperature dependent specific heat and magnetic susceptibility in single crystals of the series of intermetallic compounds Tb1−xYxRhIn5 (nominal concentrations x = 0.0, 0.15, 0.3, 0.4, 0.5, 0.7). A mean field approximation to simulate the macroscopic properties along the series has been used. Neutron diffraction data in powdered samples of Tb0.6Y0.4RhIn5 and Tb0.6La0.4RhIn5 reveal antiferromagnetic (AFM) propagation vector k→=[12012] with the magnetic moments oriented along the tetragonal c axis or canted from this axis, respectively for Y and La-substitutions. Considering both the simulations of the magnetic exchange and neutron diffraction data, we discuss the role of combined effects of crystalline electric field (CEF) perturbations and dilution in the evolution of magnetic properties with Y and La contents. In particular, we found negligible variations of the Bnm parameters along the Y series. The decrease of TN with x is fully dominated by magnetic dilution effects. © 2018 Elsevier Ltd.
ISSN: 0966-9795
Appears in Collections:Journal Articles

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