CAJ | 학술논문

对La_(1-x)Pr_x(Fe_(0.862)Al_(0.138))_(13)(x=0、0.1、0.2、0.3)化合物的磁性能进行了研究.该系列化合物在1223K下退火15天后,室温下表现为NaZn_(13)型结构.升温过程中,该系列化合物经历从铁磁态到反铁磁态的一级磁性转变.随着Pr含量的逐渐增多,磁性转变温度逐渐升高,铁磁态下化合物的磁化强度增大.在2T外磁场下,La_(0.8)Pr_(0.2)Fe_(11.206)Al_(1.794)化合物升温过程中的最大磁熵变为-4.21J/kg·K,降温过程中的最大磁熵变为-4.39J/kg·K.
대La_(1-x)Pr_x(Fe_(0.862)Al_(0.138))_(13)(x=0、0.1、0.2、0.3)화합물적자성능진행료연구.해계렬화합물재1223K하퇴화15천후,실온하표현위NaZn_(13)형결구.승온과정중,해계렬화합물경력종철자태도반철자태적일급자성전변.수착Pr함량적축점증다,자성전변온도축점승고,철자태하화합물적자화강도증대.재2T외자장하,La_(0.8)Pr_(0.2)Fe_(11.206)Al_(1.794)화합물승온과정중적최대자적변위-4.21J/kg·K,강온과정중적최대자적변위-4.39J/kg·K.
The magnetic properties in La_(1-x)Pr_x(Fe_(0.862)Al_(0.138))_(13)(x=0、0.1、0.2、0.3) have been investigated.The compounds exhibit NaZn_(13)-type cubic structure after annealing at 1233K for 15 days.During the heating process,they undergo the first-order magnetic phase transition process from ferromangtic to antiferromangtic.The phase transition temperature and the magnetization on the ferromagnetic phase increase with Pr content increasing.Under the field change of 2T,the maximum magnetic entropy change for La_(0.8)Pr_(0.2)Fe_(11.206)Al_(1.794) compound is -4.21J/kgK on the heating,while it's -4.39J/kgK on the cooling.