具有Ruddlesden-Popper结构的杂化非本征铁电体(Ca1-xSmx)3Ti2O7陶瓷的制备及其物理性能
Preparation and physical properties of improper ferroelectric(Ca1-xSmx)3Ti2O7 ceramics with Ruddlesden-Popper structure
MARCO Antonio López-águila 1柳志旭 1王守宇 2黄聪 1刘卫芳1
作者信息
- 1. 天津大学理学院,天津 300350
- 2. 天津师范大学物理与材料科学学院,天津 300387
- 折叠
摘要
为探究稀土离子掺杂对Ca3Ti2O7物理性能的调控,采用固相反应法制备了 Sm3+掺杂的(Ca1-xSmx)3Ti2O7(x=0,0.02,0.04)陶瓷样品,通过XRD、XPS、紫外-可见光吸收光谱以及第一性原理计算等方法对样品的晶体结构、光学性能、电学性能和磁学性能进行分析.结果表明:随着Sm3+含量的增加,(Ca1-xSmx)3Ti2O7的晶胞参数逐渐增大.Sm3+掺杂导致氧空位减少,因此样品的漏电流随着Sm3+掺杂量的增加而减小.同时,随着Sm3+掺杂量的增加,样品的光学带隙呈现增大趋势.此外,第一性原理研究表明,Sm3+掺杂可在体系中诱导出磁性能,进一步丰富了该材料的物理性能.
Abstract
In order to investigate the influence of rare earth ion doping on the physical properties of Ca3Ti2O7,the ceramic sam-ples of Sm3+ion-doped(Ca1-xSmx)3Ti2O7(x=0,0.02,0.04)were prepared by solid-state reaction method.The crystal structure,optical properties,electrical properties and magnetic properties of the samples were analyzed by X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),UV-VIS absorption spectroscopy and first-principles calculations.The experimental results show that with the increase of Sm3+ion content,the unit cell parameters of(Ca1-xSm,)3Ti2O7 gradually increase.The leakage cur-rent of the samples decreases with the increase of Sm3+doping because Sm3+doping led to a reduction in oxygen vacancy content.Additionally,the optical bandgap of the samples exhibits an increasing trend with the growing concentration of Sm3+ions.In addition,first-principles studies indicate that Sm3+doping can induce magnetic properties in the system,further enriching the physical properties of the material.
关键词
(Ca1-xSmx)3Ti2O7陶瓷/铁电性/氧空位/光学带隙/第一性原理Key words
(Ca1-xSmx)3Ti2O7 ceramic/ferroelectricity/oxygen vacancy/optical band-gap/first-principles引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据