TY - JOUR
T1 - Nonlinear influence of excess Mn on the magnetoelastic transition in (Mn,Cr)2Sb
AU - Shen, Qi
AU - Batashev, Ivan
AU - Ojiyed, Hamutu
AU - Zhang, Fengqi
AU - van Dijk, Niels
AU - Brück, Ekkes
PY - 2022
Y1 - 2022
N2 - The influence of excess Mn on the magnetoelastic ferromagnetic-to-antiferromagnetic transition Tt in the magnetocaloric compound (Mn,Cr)2Sb has been studied. With increasing excess Mn the magnetoelastic transition temperature for (Mn,Cr)2Sb initially increases and then decreases. This trend is accompanied by a strong reduction of the (Mn,Cr)Sb secondary phase. With increasing excess Mn a higher Cr content was found in the (Mn,Cr)Sb secondary phase in comparison to the matrix phase. This competition for Cr leads to a nonlinear dependence of Tt with increasing excess Mn at a fixed nominal Cr content. However, we observed that Tt depends linear on the c/a ratio for a wide range of temperatures from 170 to 350 K. A compositional diagram of the c/a ratio was constructed to assist the selection of (Mn,Cr)2Sb alloys with a desired transition temperature.
AB - The influence of excess Mn on the magnetoelastic ferromagnetic-to-antiferromagnetic transition Tt in the magnetocaloric compound (Mn,Cr)2Sb has been studied. With increasing excess Mn the magnetoelastic transition temperature for (Mn,Cr)2Sb initially increases and then decreases. This trend is accompanied by a strong reduction of the (Mn,Cr)Sb secondary phase. With increasing excess Mn a higher Cr content was found in the (Mn,Cr)Sb secondary phase in comparison to the matrix phase. This competition for Cr leads to a nonlinear dependence of Tt with increasing excess Mn at a fixed nominal Cr content. However, we observed that Tt depends linear on the c/a ratio for a wide range of temperatures from 170 to 350 K. A compositional diagram of the c/a ratio was constructed to assist the selection of (Mn,Cr)2Sb alloys with a desired transition temperature.
KW - Exchange inversion
KW - Magnetocaloric materials
KW - Magnetoelastic transition
UR - http://www.scopus.com/inward/record.url?scp=85123764885&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2022.164011
DO - 10.1016/j.jallcom.2022.164011
M3 - Article
AN - SCOPUS:85123764885
SN - 0925-8388
VL - 903
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
M1 - 164011
ER -