Y_(0.9)Pr_(0.1)CrO_3的反常磁性  

NOVEL MAGNETIZATION IN Y_(0.9)Pr_(0.1)CrO_3 PEROVSKITE

作　　者：戴玉蓉[1] 邓冬梅[1] 王星宇[1] 曹世勋[1] 张金仓[1] 

机构地区：[1]上海大学物理系,上海200444

出　　处：《低温物理学报》2012年第4期253-257,共5页Low Temperature Physical Letters

基　　金：国家自然科学基金(批准号:10804067;11074163)资助的课题~~

摘　　要：采用固相反应法制备了YCrO3多晶样品,并首次制备了和Y0.9Pr0.1CrO3多晶样品,研究了其磁性质.在场冷模式下,外加磁场为100Oe时,Y0.9Pr0.1CrO3的磁化强度-温度关系曲线显示磁化反转的异常.在尼尔温度以下,随着温度的降低,磁化强度首先增加,在96K达到最大值,约0.230emu/g.之后磁化强度开始降低,在32K变为零值;并且在32K以下,磁化强度出现负值.这种现象解释为Pr离子的顺磁效应.Y0.9Pr0.1CrO3 and YCrOa polycrystalline samples were prepared by solid state reaction and their magnetic properties have been studied. The magnetization- temperature （M- T） curve of Y0.9Pr0.1CrO3 exhibits negative magnetization in field-cooled model with applied field of 100 Oe. Below Nfel temperature, magnetization increases with decreasing temperature, then achieves the maximum （MMAx） Of 0. 230 emu/g at the temperature about 96K. Then magnetization begins to drop with further decreasing of tempetature, passes through a zero values at the temperature of 32K. This temperature called compensation temperature （Tcomp）. Below the Tcomp, magnetization becomes negative. This behavior is interpreted in paramagnetic effect of Pr ions.

关 键 词：铬酸盐 负磁化 倾角反铁磁 

分 类 号：O482.5[理学—固体物理]