Shiya Ye, Duan Li, Liang Zeng, Jun-sheng Li, F. Cao
{"title":"非化学计量氮化氧EuTaO1.75N1.25的快速合成、结构和磁性能","authors":"Shiya Ye, Duan Li, Liang Zeng, Jun-sheng Li, F. Cao","doi":"10.1080/17436753.2020.1858011","DOIUrl":null,"url":null,"abstract":"ABSTRACT 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+.","PeriodicalId":7224,"journal":{"name":"Advances in Applied Ceramics","volume":"14 1","pages":"58 - 62"},"PeriodicalIF":1.3000,"publicationDate":"2020-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Rapid synthesis, structure, and magnetic properties of the non-stoichiometric oxynitride EuTaO1.75N1.25\",\"authors\":\"Shiya Ye, Duan Li, Liang Zeng, Jun-sheng Li, F. Cao\",\"doi\":\"10.1080/17436753.2020.1858011\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"ABSTRACT 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+.\",\"PeriodicalId\":7224,\"journal\":{\"name\":\"Advances in Applied Ceramics\",\"volume\":\"14 1\",\"pages\":\"58 - 62\"},\"PeriodicalIF\":1.3000,\"publicationDate\":\"2020-12-14\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Advances in Applied Ceramics\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1080/17436753.2020.1858011\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"MATERIALS SCIENCE, CERAMICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advances in Applied Ceramics","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1080/17436753.2020.1858011","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}
Rapid synthesis, structure, and magnetic properties of the non-stoichiometric oxynitride EuTaO1.75N1.25
ABSTRACT 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+.
期刊介绍:
Advances in Applied Ceramics: Structural, Functional and Bioceramics provides international coverage of high-quality research on functional ceramics, engineering ceramics and bioceramics.