Rapid synthesis, structure, and magnetic properties of the non-stoichiometric oxynitride EuTaO1.75N1.25
Rapid synthesis, structure, and magnetic properties of the non-stoichiometric oxynitride EuTaO1.75N1.25
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非化学计量氮氧化物EuTaO1.75N1.25的快速合成、结构和磁性能
DOI：
10.1080/17436753.2020.1858011
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发表时间：
2020-12
影响因子：
2.2
通讯作者：
Feng Cao
中科院分区：
文献类型：
--
作者：
Shiya Ye;Duan Li;Liang Zeng;Junsheng Li;Feng Cao
采用尿素法结合改进的放电等离子烧结装置在10 min内合成了非化学计量比的EuTaO_（1.75）N_（1.25）氮氧化物。采用第一性原理计算研究了EuTaO_（1.75）N_（1.25）的电子性质。X射线粉末衍射分析表明，EuTaO_（1.75）N_（1.25）具有立方钙钛矿结构，S. G.晶格常数a = 4.0283（7）Ω.热重研究表明，EuTaO1.75 N1.25在氧气气氛下在345左右分解，得到最终分解产物EuTaO 4和Eu 5 Ta 4 O 15氧化物。磁化率测量表明EuTaO_（1.75）N_（1.25）具有顺磁性，Tc = 9.9K。由于Eu 3+的存在，其饱和磁矩为6.82 μB，小于Eu 2+预期的7 μB。获得的剩磁和矫顽场的极低的值同意的各向同性字符的8 S7/2基态相关的Eu 2+。
Non-stoichiometric oxynitride with a composition of EuTaO1.75N1.25 was synthesized in <10 min through urea route combined with modified pressureless spark plasma sintering apparatus. The electronic properties of EuTaO1.75N1.25 was investigated by first-principles calculations. X-ray powder diffraction revealed that EuTaO1.75N1.25 crystallized with the cubic perovskite-type structure, S.G. , and a lattice constant of a = 4.0283(7) Å. Thermogravimetric studies revealed that EuTaO1.75 N1.25 decomposed at around 345 under the oxygen atmosphere, giving a final product of decomposition as EuTaO4 and Eu5Ta4O15 oxides. Magnetic susceptibility measurements indicated EuTaO1.75 N1.25‘s paramagnetic behavior with an estimated T c =9.9 K. The saturation moment of 6.82 μB which is smaller than 7 μB expected for Eu2+ can be due to the existence of Eu3+. The extremely low value obtained for remanence and coercive field agrees to the isotropic character of the 8S7/2 ground state associated to the Eu2+.
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DOI：
10.1107/s0108768106002448
发表时间：
2006-06
期刊：
Acta crystallographica. Section B, Structural science
影响因子：
--
作者：
P. W. Barnes;M. Lufaso;P. Woodward
通讯作者：
P. W. Barnes;M. Lufaso;P. Woodward
轻松合成具有优异可见光催化性能的SrNbO2N纳米颗粒
影响因子：
3
作者：
Jianqiang Wang;Xia Wang;Bing Liu;Xianghua Li;Minhua Cao
通讯作者：
Minhua Cao
影响因子：
3
作者：
D. Fasquelle;A. Ziani;C. L. Paven-Thivet;L. Gendre;J. Carru
通讯作者：
D. Fasquelle;A. Ziani;C. L. Paven-Thivet;L. Gendre;J. Carru
影响因子：
3.3
作者：
R. Pastrana-Fábregas;J. Isasi-Marín;C. Cascales;R. Sáez-Puche
通讯作者：
R. Pastrana-Fábregas;J. Isasi-Marín;C. Cascales;R. Sáez-Puche
影响因子：
3.3
作者：
S. Porter;Zhenguo Huang;Zhenxiang Cheng;M. Avdeev;Zhixin Chen;S. Dou;P. Woodward
通讯作者：
S. Porter;Zhenguo Huang;Zhenxiang Cheng;M. Avdeev;Zhixin Chen;S. Dou;P. Woodward