Print Email Facebook Twitter The antiferromagnetic to ferrimagnetic phase transition in Mn2Sb1-xBix compounds Title The antiferromagnetic to ferrimagnetic phase transition in Mn2Sb1-xBix compounds Author Shen, Q. (TU Delft RST/Fundamental Aspects of Materials and Energy) Batashev, I. (TU Delft RST/Fundamental Aspects of Materials and Energy) Zhang, F. (TU Delft RST/Fundamental Aspects of Materials and Energy) Ojiyed, Hamutu (External organisation) van Dijk, N.H. (TU Delft RST/Fundamental Aspects of Materials and Energy) Brück, E.H. (TU Delft RST/Fundamental Aspects of Materials and Energy) Date 2021 Abstract The influence of partial substitution of Bi for Sb on the structure, magnetic properties and magnetocaloric effect of Mn2Sb1-xBix (x = 0, 0.02, 0.04, 0.05, 0.07, 0.09, 0.15, 0.20) compounds has been investigated. The transition temperature of the antiferro-to-ferrimagnetic (AFM-FIM) transition initially increases with increasing Bi and decreases above 9%. Density functional theory calculations indicate that the Bi atoms prefer to occupy only the Sb site, which accounts for the large magnetization jump in Mn2Sb0.93Bi0.07. As large lattice parameters are found for Bi substituted Mn2Sb, the origin of the AFM-FIM transition in Mn2Sb(1-x)Bix compounds is ascribed to an enhanced coefficient of thermal expansion along the c axis, resulting from the Bi substitution. The moderate entropy change of 1.17 J/kg K under 2 T originating from the inverse magnetocaloric effect and the strong magnetic field dependence of the transition temperature of dTt/dµ0H = −5.4 K/T in Mn2Sb0.95Bi0.05 indicate that this alloy is a promising candidate material for magnetocaloric applications. Subject Antiferro-to-ferrimagnetic phase transitionExchange inversionInverse magnetocaloric effect To reference this document use: http://resolver.tudelft.nl/uuid:7705fdd7-fee8-4044-b2dc-f1555990cd0b DOI https://doi.org/10.1016/j.jallcom.2021.158963 ISSN 0925-8388 Source Journal of Alloys and Compounds, 866 Part of collection Institutional Repository Document type journal article Rights © 2021 Q. Shen, I. Batashev, F. Zhang, Hamutu Ojiyed, N.H. van Dijk, E.H. Brück Files PDF 1_s2.0_S0925838821003704_main.pdf 3.46 MB Close viewer /islandora/object/uuid:7705fdd7-fee8-4044-b2dc-f1555990cd0b/datastream/OBJ/view