NiCr_(2)O_(4)化合物的磁相变临界行为  

Critical behavior of magnetic phase transitions in NiCr_(2)O_(4)compounds

作　　者：张名锋 曹睿阳 斯一凡 戴振翔[2] 郑赣鸿[1] ZHANG Mingfeng;CAO Ruiyang;SI Yifan;DAI Zhenxiang;ZHENG Ganhong(Schoolof Materials Scienceand Engineering,Anhui University,Hefei 230601,China;Schoolof Physicsand Optoelectronic Engineering,Anhui University,Hefei 230601,China)

机构地区：[1]安徽大学材料科学与工程学院,安徽合肥230601 [2]安徽大学物理与光电工程学院,安徽合肥230601

出　　处：《安徽大学学报（自然科学版）》2024年第5期42-46,共5页Journal of Anhui University(Natural Science Edition)

基　　金：国家重点研发计划项目(2021YFA1600200)。

摘　　要：采用标准固相法制备NiCr_(2)O_(4),并对其结构、磁性能和磁相变临界行为进行研究.研究结果表明:NiCr_(2)O_(4)具有尖晶石结构;当温度低于居里温度TC时,随着磁场强度增加,磁化强度趋于饱和;当温度高于TC,随着磁场强度增加,磁化强度线性增加,NiCr_(2)O_(4)呈顺磁特征;长程和短程铁磁相互作用共存于NiCr_(2)O_(4).NiCr_(2)O_(4)was prepared by standard solid phase method,and its structure,magnetic properties and critical behavior of magnetic phase transition were studied.The results showed that NiCr_(2)O_(4)had spinel structure.When the temperature was lower than the Curie temperature T_(C),the magnetization tended to be saturated with the increase of magnetic field intensity.When the temperature was higher than T_(C),the magnetization increased linearly with the increase of magnetic field intensity,and NiCr_(2)O_(4)exhibited paramagnetic characteristics.Long range and short range ferromagnetic interactions coexisted in NiCr_(2)O_(4).

关 键 词：NiCr_(2)O_(4) 二级相变 临界行为 居里温度 

分 类 号：TQ622.21[化学工程—精细化工]