@article{10902/20566,
year = {2020},
month = {10},
url = {http://hdl.handle.net/10902/20566},
abstract = {Recently, potential technological interest has been revealed for the production of magnetocaloric alloys using Rare-Earth intermetallics. In this work, three series of TbxR1_xCu2 (R   Gd, La, Y) alloys have been produced in bulk and nanoparticle sizes via arc melting and high energy ball milling. Rietveld refinements of the X-ray and Neutron diffraction patterns indicate that the crystalline structure in all alloys is consistent with TbCu2 orthorhombic Imma bulk crystalline structure. The analyses of the DC-magnetisation (MDC) and AC-susceptibility (cAC) show that three distinct degrees of disorder have been achieved by the combination of both the Tb3+replacement (dilution) and the nanoscaling. These disordered states are characterised by transitions which are evident to MDC, cAC and specific heat. There exists an evolution from the most ordered
Superantiferromagnetic arrangement of the Tb0.5La0.5Cu2 NPs with Néel temperature, TN   27 K,
and freezing temperature, Tf   7 K, to the less ordered weakly interacting Superparamagnetism of the Tb0.1Y0.9Cu2 nanoparticles (TN absent, and TB   3 K). The Super Spin Glass Tb0.5Gd0.5Cu2
nanoparticles (TN absent, and Tf   20 K) are considered an intermediate disposition in between those two extremes, according to their enhanced random-bond contribution to frustration.},
organization = {This work has been supported by the Spanish MAT2017-83631-C3-R grant. E.M.J.’s work was supported by “Beca de Colaboración”, BDNS: 311327 granted by Ministerio de Educación, Cultura y Deporte and “Beca Concepción Arenal” BDNS: 406333 granted by the Gobierno de Cantabria and the Universidad de Cantabria. MRF work was supported by FPI (BES-2012-058722).},
publisher = {MDPI},
publisher = {Nanomaterials 2020, 10, 2148},
title = {Exploring the Different Degrees of Magnetic Disorder in TbxR1_xCu2 Nanoparticle Alloys},
author = {Martín Jefremovas, Elizabeth and Fuente Rodríguez, María de la and Alonso Masa, Javier and Rodríguez Fernández, Jesús and Espeso Martínez, José Ignacio and Puente-Orench, Inés and Rojas, Daniel P. and Gracía-Prieto, Ana and Fernández-Gubieda, María Luisa and Rodríguez-Fernández, Lidia and Fernández Barquín, Luis},
}