【摘要】 通过固相反应法制备了具有钙钛矿结构的La_1-xBa_xCrO₃（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-xBa_xCrO₃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-xBa_xCrO₃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.更多还原

【Abstract】 Polycrystalline La_1-xBa_xCrO₃ （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-xBa_xCrO₃ 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-xBa_xCrO₃ samples below antiferromagnetic transition temperature. The resistivity at low temperature showed semiconductor characteristics and decreased with the increase of Ba content.更多还原