摘要
利用X射线衍射(XRD)和扫描电镜(SEM)对La(1-x)2/3Zn1/3MnO3结构及表面形貌进行了研究。X射线衍射测量分析表明空位掺杂后,样品的主相仍然是钙钛矿结构(Pnma),其晶体对称性不会随空位浓度的增加而改变。随着空位掺杂浓度的增加,样品的晶格常数增大,体积膨胀。当空位掺杂浓度x≤0.04时,该材料致密度较大;随着空位掺杂浓度继续增加,该材料致密度又逐渐变小。
The crystal structures and surface morphologies of La(1-x)2/3Zn1/3 MnO3 were studied by X-Ray Dif- fraction(XRD) and Scanning electron microscope (SEM). All the samples analyzed by XRD are orthorhombic symmetry (Pnma ), and the symmetry has no obvious change with the increase of La-vacancies content x. The crystal lattice constants and the unit-cell volume increase with the increase of La-cancies content. The samples can increase the density with the increase of La-vacancy content as x ≤0.04.
出处
《南昌大学学报(工科版)》
CAS
2008年第3期283-285,共3页
Journal of Nanchang University(Engineering & Technology)
基金
南昌大学科学基金资助项目(Z-03694)
南京大学固体微结构物理国家重点实验室基金资助项目(M041916)
关键词
晶体结构
表面形貌
微观机制
空位
crystal structure
surface morphology
Micro-mechanism
vacancy