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粉末冶金材料科学与工程  2023, Vol. 28 Issue (6): 522-533    DOI: 10.19976/j.cnki.43-1448/TF.2023066
  工艺技术 本期目录 | 过刊浏览 | 高级检索 |
Nd3+、Sm3+和Eu3+单掺杂NiTiO3的光电磁性能
虞鹏飞, 热比古丽·图尔荪
新疆大学 物理科学与技术学院,乌鲁木齐 830046
Optical, electrical, and magnetic properties of Nd3+, Sm3+, and Eu3+ single-doped NiTiO3
YU Pengfei, TURSUN Rabigul
School of Physical Science and Technology, Xinjiang University, Urumqi 830046, China
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摘要 采用溶胶-凝胶法合成纳米Ni1-xRxTiO3 (R=Nd、Sm和Eu,x=0、0.05和0.1)粉末,结合X射线衍射、扫描电子显微镜、X射线光电子能谱、拉曼光谱及综合物性测量系统等表征技术,系统研究了Nd、Sm和Eu掺杂对钛酸镍(NiTiO3)微观结构和光电磁性能的影响。结果表明:所有样品均出现O—Ti键和O—Ni键的电荷转移(200~365 nm),Ni2+3A2g(3F)→3T1g(3P)自旋容许跃迁(450 nm),1T2g(1D)、1A1g(1G)的自旋禁阻跃迁(490~520 nm)以及1Eg(1D)的自旋禁阻跃迁(743 nm)。Nd掺杂样品的吸收光谱在588 nm附近出现与八面体位置Nd3+电子跃迁有关的吸收峰,样品从黄色变为绿色。所有样品均在室温下表现出反铁磁性和铁电性,且Ni位掺杂Nd、Sm和Eu能显著增强NiTiO3的铁电性。掺杂离子半径较大的元素导致晶格畸变,促进铁电畴的转动,增强铁电性。
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虞鹏飞
热比古丽·图尔荪
关键词 NiTiO3铁磁性铁电性掺杂溶胶-凝胶法    
Abstract:Nanosized Ni1-xRxTiO3 (R=Nd, Sm and Eu; x=0, 0.05 and 0.1) powders were synthesized by sol-gel method. The effects of Nd, Sm, and Eu doping on the microstructure and optical, electrical, and magnetic properties of NiTiO3 were systematically studied using characterization techniques such as X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, Raman spectroscopy, and physical property measurement system. The results show that all samples exhibit charge transfer of O—Ti bonds and O—Ni bonds (200-365 nm), spin-allowed transition of Ni2+ from 3A2g(3F) to 3T1g(3P) (450 nm), spin-forbidden transitions of 1T2g(1D) and 1A1g(1G) (490-520 nm), and spin-forbidden transition of 1Eg(1D) (743 nm). Absorption spectra of Nd- doped samples exhibit an absorption peak near 588 nm correlated with the electronic transition of Nb3+ at the octahedral position, which change the samples color from yellow to green. All samples exhibit antiferromagnetism and ferroelectricity at room temperature, and Nd, Sm, and Eu doping at the Ni site significantly enhance the ferroelectricity of NiTiO3. Doping elements with larger ionic radii cause lattice distortion, promote the rotation of ferroelectric domains, and enhancc the ferroelectricity.
Key wordsNiTiO3    ferromagnetism    ferroelectricity    doping    sol-gel method
收稿日期: 2023-07-25      出版日期: 2024-01-23
ZTFLH:  TB34  
基金资助:新疆维吾尔自治区自然科学基金资助项目(2021D01C09)
通讯作者: 热比古丽·图尔荪,副教授,博士。电话:0991-8582404;E-mail: Rabigul@xju.edu.cn   
引用本文:   
虞鹏飞, 热比古丽·图尔荪. Nd3+、Sm3+和Eu3+单掺杂NiTiO3的光电磁性能[J]. 粉末冶金材料科学与工程, 2023, 28(6): 522-533.
YU Pengfei, TURSUN Rabigul. Optical, electrical, and magnetic properties of Nd3+, Sm3+, and Eu3+ single-doped NiTiO3. Materials Science and Engineering of Powder Metallurgy, 2023, 28(6): 522-533.
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http://pmbjb.csu.edu.cn/CN/10.19976/j.cnki.43-1448/TF.2023066     或     http://pmbjb.csu.edu.cn/CN/Y2023/V28/I6/522
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