Indium segregation in Gd-5(Si, Ge)(4) magnetocaloric materials

Belo, J.H. ; Mudryk, Y. ; Pereira, A.M. ; Oliveira, G.N.P. ; Lopes, A.M.L. ; Paudyal, D. ; Morellon, L. (Universidad de Zaragoza) ; Algarabel, P.A. ; Magen, C. (Universidad de Zaragoza) ; Ibarra, M.R. (Universidad de Zaragoza) ; Marcano, N. (Universidad de Zaragoza) ; Pecharsky, V.K. ; Araújo, J.P.

Resumen: Chemical substitution is one of the most efficient tools to tune and optimize magnetic and magnetocaloric properties of the giant magnetocaloric materials. In particular, Indium substitutions could be useful both for tuning properties of these interesting intermetallic materials and to unveil their local-scale behavior across the magnetostructural transition via hyperfine techniques. Hence, in order to investigate the effect of Indium additions on the crystal structure, micro-structure, magnetic and magnetocaloric properties, a series of In-containing samples derived from the base Gd5Si1.2Ge2.8 stoichiometry were prepared. The major findings are that while In is insoluble in the 5: 4 phase, it will instead promote the emergence of the impurity 5: 3 phase and segregates into this phase. Hence, In leads to major crystallographic changes, which enhance atomic disorder and disrupt the Si to Ge ratio in the 5: 4 phase. Subsequently, a higher 5: 4 unit cell volume and a lower magnetic ordering temperature are found in the In-substituted samples. Finally, the magnetocaloric properties of the In-substituted samples reveal a detrimental effect on the maximum magnetic entropy change.

Idioma: Inglés

DOI: 10.1016/j.jallcom.2021.162245

Año: 2022

Publicado en: JOURNAL OF ALLOYS AND COMPOUNDS 893 (2022), 162245 [10 pp]
ISSN: 0925-8388

Factor impacto JCR: 6.2 (2022)

Categ. JCR: METALLURGY & METALLURGICAL ENGINEERING rank: 8 / 79 = 0.101 (2022) - Q1 - T1
Categ. JCR: CHEMISTRY, PHYSICAL rank: 45 / 161 = 0.28 (2022) - Q2 - T1
Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 91 / 343 = 0.265 (2022) - Q2 - T1

Factor impacto CITESCORE: 10.9 - Materials Science (Q1) - Engineering (Q1)

Factor impacto SCIMAGO: 1.079 - Materials Chemistry (Q1) - Metals and Alloys (Q1) - Mechanics of Materials (Q1) - Mechanical Engineering (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA/E28-20R
Financiación: info:eu-repo/grantAgreement/ES/FEDER/POCI-01-0141-029454
Financiación: info:eu-repo/grantAgreement/ES/FEDER/POCI-01-0141-032527
Financiación: info:eu-repo/grantAgreement/ES/MCIU/PID2020-112914RB-I00
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2017-82970-C2

Tipo y forma: Article (PostPrint)

Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)