Tb(Fe,Ti)_(12)的磁相图  

Magnetic Phase Diagram of Tb(Fe,Ti)12

作　　者：高书侠[1] 李养贤[2] 杜江[2] 唐成春[2] 吴光恒[2] 胡伯平[2] 贾克昌[2] 詹文山[2] 

机构地区：[1]河北师范大学西校区物理系 [2]中国科学院物理所磁学国家重点实验室

出　　处：《金属功能材料》1998年第3期104-107,110,共5页Metallic Functional Materials

基　　金：人事部留学人员回国基金

摘　　要：采用成分准确的单晶样品进行磁性测量，得到了１．５～６００Ｋ温度范围内整个ＴｈＭｎ１２结构ＴｂＦｅ１２－ｘＴｉｘ（ｘ＝０．８～１．４）的磁相图。确定了ＴｂＦｅ１１Ｔｉ的ＴＳＲ为２９６Ｋ，在室温下为单轴各向异性的性质。实验指出，由于Ｔｉ原子对稀土亚晶格的强烈影响，ＴＳＲ对Ｔｉ含量的变化十分敏感。同时，ＴＣ＝５６０Ｋ不随Ｔｉ含量而变化，证明了Ｔｉ对Ｆｅ－Ｆｅ相互作用的影响很弱。当Ｔｉ含量较低（ｘ≤１）时，磁晶各向异性表现出不可忽略的“易锥”过程。同时还发现面内各向异性的存在及其受温度变化影响的证据。本工作还讨论了在材料制备中包晶反应和Ｔｉ分凝现象对样品成分的影响。Single crystals of TbFe12-xTix have been grown by CZ method for magnetic measurementThe magnetic phase transition of TbFe12-xTix for the tetragonal ThMn12 structure in the composition range of x=08～14 has been illustrated from the data measured by ESM or VSM in the temperature range of 15～600KTbFe11Ti compound shows a uniaxial magnetic anisotropy at room temperature with TSR=296KExperimental results indicate that the TSR is very sensitive to the concentration of titanium,which implies the strong influence of Ti atoms on the rare earth sublatticesOn the other hand,the results show that the Curie temperature of the compound is a constant of 560K in the variation range of Ti concentration of x=08～14With low Ti content(x≤1),a obvious canted moment structure has been observed during the transition between easyplane and uniaxial anistropy.The influence of the material preparation on the TSRmeasurement has also been discussed

关 键 词：磁相图 Tb(Fe Ti)12 自旋重取向 单晶生长 

分 类 号：TM270.1[一般工业技术—材料科学与工程]