Effect of Co and Ni doping on the structure, magnetic and magnetocaloric properties of Fe-rich (Mn,Fe)2(P,Si) compounds

被引：4

作者：

Kiecana, A. ^{[1
]}

Batashev, I ^{[1
]}

Dugulan, A., I ^{[1
]}

Kwakernaak, C. ^{[2
]}

Pieter, L. ^{[1
]}

Zhang, F. ^{[1
]}

Van Dijk, N. H. ^{[1
]}

Bruck, E. ^{[1
]}

机构：

[1] Delft Univ Technol, Fundamental Aspects Mat & Energy Grp, Fac Appl Sci, Dept Radiat Sci & Technol, Mekelweg 15, NL-2629 JB Delft, Netherlands

[2] Delft Univ Technol, Dept Mat Sci & Engn, Mekelweg 2, NL-2628 CD Delft, Netherlands

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2022年 / 561卷

基金：

荷兰研究理事会;

关键词：

Magnetocaloric materials; Magnetic properties; Mossbauer spectroscopy; (Mn; Fe)(2) (P; Si); 1ST-ORDER TRANSITION; TEMPERATURE; REFRIGERATION; ALLOYS;

D O I：

10.1016/j.jmmm.2022.169710

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of Co and Ni doping on the structure, magnetic and magnetocaloric properties of Fe-rich (Mn,Fe)2(P, Si) compounds was studied. With increasing Co and Ni content, both the Curie temperature (T-c) and the thermal hysteresis (Delta T-hys) decreased, whereas the hexagonal P-62 m crystal structure was maintained. A pronounced reduction in hysteresis was observed upon Co doping, while a significant reduction in Curie temperature was found upon Ni doping. Mo"ssbauer spectroscopy measurements and DFT calculations indicated the substitution of Fe at the 3f site for both Co and Ni doping. Rietveld refinement of the X-ray diffraction data showed that Co substitute atoms in the main phase and the impurity phase, while Ni exhibits an affinity to the main phase. Magnetization measurements on the Co doped samples revealed an increase in magnetization for 2 at.% of Co, followed by a decrease for higher concentrations. DFT calculations showed that the magnetic moment on the 3f site is enhanced by Co substitution, whereas an opposite trend was observed for Ni substitution.

引用

页数：9

共 41 条

[1]

ARMSTRONG JT, 1991, ELECTRON PROBE QUANTITATION, P261

[2] PROJECTOR AUGMENTED-WAVE METHOD [J].