摘要
利用固相反应合成了Ｅｕ１－ｘＣａｘＦｅＯ３钙钛矿氧化物．ＸＲＤ测量表明，在ｘ≤０．６范围内为钙钛矿结构；室温下的５７ＦｅＭｏｓｓｂａｕｅｒ谱测试给出３个磁谱和１个顺磁双线谱；在３个磁谱中，１个为处于四配位的Ｆｅ离子，另外２个为处于八配位的Ｆｅ离子．ＸＰＳ谱表明Ｆｅ２ｐ３／２的高结合能端出现与Ｆｅ离子配位状态相对应的肩峰．所有Ｆｅ离子都处于＋３价态．
Samples of Fe 1-x Ca x FeO 3( x =0.0, 0.2￣1.0) were prepared by solid state reaction method. XRD measurements show that compounds for x <0.6 have a perovskite structure. Three magnetic and one doublet species were observed at room temperature in the Mssbauer spectra. One of the three magnetic components corresponds to Fe ions in tetrahedral coordination, and the other to Fe ions in octahedral coordination. The shoulder peak of Fe 2p 3/2 for the samples with x =0 related to Fe ions in different coordinated state. The Fe ions are all in a trivalent state.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1998年第2期275-279,共5页
Chemical Journal of Chinese Universities
基金
国家自然科学基金
