The phase transition of Nd_(2)In and Pr_(2)In has been studied and found to be between the first-order and second-order nature.Hardly any hysteresis nor obvious cell volume changes are presented.Concurrently the field...The phase transition of Nd_(2)In and Pr_(2)In has been studied and found to be between the first-order and second-order nature.Hardly any hysteresis nor obvious cell volume changes are presented.Concurrently the field-triggered metamagnetism is demonstrated with lambda-like peak on specific heat curve.For the field change of 7 T,giant magnetic entropy changes of 13.2 J kg^(-1)K^(-1) and 19.5 J kg^(-1)K^(-1) and adiabatic temperature changes of 6.5 K and 7.4 K have been achieved in Nd_(2)In and Pr_(2) In alloys respectively,which is partially contributed by strong magnetoelastic coupling represented by high saturation magnetostriction of~450 ppm.Such unique feature is proposed to be originated from the delocalized 5d electrons,as evidenced by the negative magnetoresistance caused by the phase transition.展开更多
基金supported by the National Natural Science Foundation of China (No. 51971056)the Fundamental Research Funds for the Central Universities (Nos. N2009001, N2009002, N2002005 and N2109005)+4 种基金the Joint Funding between Shenyang National Laboratory for Materials Science and State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals (No. 18LHPY014)the Open Fundings of the State Key Laboratory of Solidification Processing in NWPU (No. SKLSP201803)the State Key Laboratory for Mechanical Behavior of Materials (No. 20202206)the State Key Laboratory of Advanced Metals and Materials (No. 2019-ZD07)the Liaoning Revitalization Talent Program (No. XLYC1907175)。
文摘The phase transition of Nd_(2)In and Pr_(2)In has been studied and found to be between the first-order and second-order nature.Hardly any hysteresis nor obvious cell volume changes are presented.Concurrently the field-triggered metamagnetism is demonstrated with lambda-like peak on specific heat curve.For the field change of 7 T,giant magnetic entropy changes of 13.2 J kg^(-1)K^(-1) and 19.5 J kg^(-1)K^(-1) and adiabatic temperature changes of 6.5 K and 7.4 K have been achieved in Nd_(2)In and Pr_(2) In alloys respectively,which is partially contributed by strong magnetoelastic coupling represented by high saturation magnetostriction of~450 ppm.Such unique feature is proposed to be originated from the delocalized 5d electrons,as evidenced by the negative magnetoresistance caused by the phase transition.
