材料科学
兴奋剂
凝聚态物理
磁化
正交晶系
声子
离子
多铁性
带隙
纳米颗粒
奈尔温度
磁场
电介质
纳米技术
光学
光电子学
物理
铁电性
衍射
量子力学
作者
A. Apostolov,I. N. Apostolova,J. M. Wesselinowa
出处
期刊:Nanomaterials
[MDPI AG]
日期:2021-10-15
卷期号:11 (10): 2731-2731
被引量:13
摘要
The magnetic, electric, phonon and optical properties of pure and ion-doped orthorhombic YFeO3 nanoparticles are studied for the first time theoretically. The spontaneous magnetization Ms in YFeO3 decreases with decreasing particle size. Ms is also shape dependent. The magnetization increases by Co and Er ion doping and decreases by Ti doping, which is caused by the different strain which appears in the nanoparticles and changes the exchange interaction constants in the doped states. The phonon energy for the Ag mode ω = 149 cm-1 and their damping decreases or increases with increasing temperature, respectively. Both show a kink near the Neel temperature, TN, which disappears by applying an external magnetic field. The influence of different ion doping on the band gap energy is also discussed. The doping effects can be used for different applications.
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