Experimental investigation of the isothermal section at 400℃of the Mgsingle bondCesingle bondSr ternary system

The objective of this study is to determine the isothermal section at 400℃ of the Mgsingle bondCesingle bondSr system.In this study,the constitution of the Cesingle bondSr system and the Mgsingle bondCesingle bondSr system have been investigated over the entire composition range using X-ray diffraction(XRD),field emission scanning electron microscope(SEM)and energy dispersive spectroscopy(EDS).No any new binary compound has been found in the Cesingle bondSr system and no ternary compound has been found in the Mgsingle bondCesingle bondSr system also.Nine three-phase regions have been experimentally observed.Six binary phases Mg_(2)Sr,Mg_(23)Sr_(6),Mg_(38)Sr_(9),Mg_(17)Sr_(2),Mg_(12)Ce,Mg_(41)Ce_(5) are detected dissolving about 3-7 at.%the third element.This study first detected the experimental data of the Cesingle bondSr binary system and determined the isothermal section at 400℃ of the Mgsingle bondCesingle bondSr ternary system.

Tuning structure and magnetic properties of table-like magnetocaloric effect in Er_(6)MnSb_(2) by zirconium substitution

In this study,zirconium(Zr) successfully substituted for erbium(Er) in Er_(6-x)Zr_(x)MnSb_(2)(x=0,0.5,1,1.5) of the Fe_(2)P type,with comprehensive characterizations on crystal structure,electronic structure and magnetic properties.According to synchrotron powder X-ray diffraction data analysis and density functional theory calculation,Zr does not randomly but preferentially occupy during the doping process and results in weaker magnetic exchange interactions and depressed ordering temperatures.The electronic structure data show that the doping of Zr can weaken interaction between Er and Mn atoms.Owing to multiple transitions,the Er_(6-x)Zr_(x)MnSb_(2)(x=0,0.5,1,1.5) exhibit table-like magnetocaloric effect.Er_(6)MnSb_(2) displays wide δT_(FWHM)(full width at half maximum of the magnetic entropy change curve) of 116 K and high relative cooling power of 388.62 J/kg for 3 T.The maximum magnetic entropy change of Er_(6-x)Zr_(x)MnSb_(2) is increased from 3.81 to 7.69 J/(kg·K) with the Zr content up from x=0 to x=1.5.