Ba掺杂对LaCrO_(3)物性的影响  

Effect of Ba Doping on Physical Properties of LaCrO_(3)

作　　者：杨帆[1,2] 赵勇 陈永亮[1,2] YANG Fan;ZHAO Yong;CHEN Yongliang(School of Physical Science and Technology,Southwest Jiaotong University,Chengdu 61003l;Key Laboratory of Magnetic Suspension Technology and Magleu Vehicle,Ministry of Education,Southwest Jiaotong University,Chengdu 610031;College of Physics and Energy,Fujian Normal University,Fuzhou 350117)

机构地区：[1]西南交通大学物理科学与技术学院,成都610031 [2]西南交通大学磁浮技术与磁浮列车教育部重点实验室,成都610031 [3]福建师范大学物理与能源学院,福州350117

出　　处：《低温物理学报》2024年第1期33-41,共9页Low Temperature Physical Letters

基　　金：磁浮技术与磁浮列车教育部重点实验室开放课题资助的课题。

摘　　要：通过固相反应法制备了具有钙钛矿结构的La_(1-x)Ba_(x)CrO_(3)(0≤x≤0.3)多晶样品,利用X射线衍射对其晶体结构进行表征,并对X射线衍射数据进行了精修,获得La_(1-x)Ba_(x)CrO_(3)系列样品的晶体结构数据,测量了所有样品在低温下的磁化强度和电阻率,随着Ba含量的增加,反铁磁转变温度降低,在反铁磁转变温度以下,反铁磁性与铁磁性共存,La_(1-x)Ba_(x)CrO_(3)在低温下的电阻率表现出半导体特性,随Ba含量的增加电阻率降低.Polycrystalline La_(1-x)Ba_(x)CrO_(3)(0≤x≤0.3)samples with perovskite structure have been synthesized in air via a solid-state reaction method.Their crystal structure was investigated by X-ray diffraction and all of X-ray diffraction data was refined.The detail structural parameters of La_(1-x)Ba_(x)CrO_(3)were summarized.DC magnetization and resistivity at low temperature were measured.The antiferromagnetic transition temperature was continuously suppressed with increasing Ba content and antiferromagnetism and ferromagnetism coexist in La_(1-x)Ba_(x)CrO_(3)samples below antiferromagnetic transition temperature.The resistivity at low temperature showed semiconductor characteristics and decreased with the increase of Ba content.

关 键 词：LaCrO_(3) 钙钛矿结构 掺杂 

分 类 号：TQ133.3[化学工程—无机化工]