P. Vijayakumar, K. Ganesan, R. M. Sarguna, Edward Prabu Amaladass, M. Suganya, R. Ramaseshan, Sujoy Sen, S. Ganesamoorthy, P. Ramasamy
{"title":"掺杂铬的β-Ga2O3 单晶的结构、光学和机械特性","authors":"P. Vijayakumar, K. Ganesan, R. M. Sarguna, Edward Prabu Amaladass, M. Suganya, R. Ramaseshan, Sujoy Sen, S. Ganesamoorthy, P. Ramasamy","doi":"10.1007/s00339-024-07870-4","DOIUrl":null,"url":null,"abstract":"<p>Undoped and Cr doped β-Ga<sub>2</sub>O<sub>3</sub> (100) single crystals are grown by optical floating zone method. The full width at half maximum of rocking curve is found to be 106 arc.sec for undoped β-Ga<sub>2</sub>O<sub>3</sub> crystals whereas the 100 and 200 ppm of Cr doped β-Ga<sub>2</sub>O<sub>3</sub> crystals display multiple rocking curves with large peak widths indicating the presence of structural defects. Raman measurements reveal broadening in the vibrational mode of ~ 350 cm<sup>− 1</sup> with a shoulder peak indicating the Cr<sup>3+</sup> dopants preferentially substitute for Ga<sup>3+</sup> at the octahedral sites. Further, the Cr doped β-Ga<sub>2</sub>O<sub>3</sub> crystals display strong optical absorption bands about 420 and 597 nm in the UV-Vis spectroscopy. Moreover, the observation of sharp characteristic photoluminescence emission lines at 690 and 697 nm also confirms the Cr substitution in the doped crystals. The indentation hardness increases nearly linear from 13.0 ± 0.6 to 17.9 ± 0.4 GPa whilst the indentation modulus decreases from 224.9 ± 21.4 to 202.4 ± 11.9 GPa upon Cr doping of 200 ppm in β-Ga<sub>2</sub>O<sub>3</sub>. The structural defects caused by the Cr doping interrupt the movement of indentation induced dislocations that results in the increase of hardness of the Cr doped β-Ga<sub>2</sub>O<sub>3</sub> (100) single crystals.</p>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":null,"pages":null},"PeriodicalIF":2.5000,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Structural, optical and mechanical properties of Cr doped β-Ga2O3 single crystals\",\"authors\":\"P. Vijayakumar, K. Ganesan, R. M. Sarguna, Edward Prabu Amaladass, M. Suganya, R. Ramaseshan, Sujoy Sen, S. Ganesamoorthy, P. Ramasamy\",\"doi\":\"10.1007/s00339-024-07870-4\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Undoped and Cr doped β-Ga<sub>2</sub>O<sub>3</sub> (100) single crystals are grown by optical floating zone method. The full width at half maximum of rocking curve is found to be 106 arc.sec for undoped β-Ga<sub>2</sub>O<sub>3</sub> crystals whereas the 100 and 200 ppm of Cr doped β-Ga<sub>2</sub>O<sub>3</sub> crystals display multiple rocking curves with large peak widths indicating the presence of structural defects. Raman measurements reveal broadening in the vibrational mode of ~ 350 cm<sup>− 1</sup> with a shoulder peak indicating the Cr<sup>3+</sup> dopants preferentially substitute for Ga<sup>3+</sup> at the octahedral sites. Further, the Cr doped β-Ga<sub>2</sub>O<sub>3</sub> crystals display strong optical absorption bands about 420 and 597 nm in the UV-Vis spectroscopy. Moreover, the observation of sharp characteristic photoluminescence emission lines at 690 and 697 nm also confirms the Cr substitution in the doped crystals. The indentation hardness increases nearly linear from 13.0 ± 0.6 to 17.9 ± 0.4 GPa whilst the indentation modulus decreases from 224.9 ± 21.4 to 202.4 ± 11.9 GPa upon Cr doping of 200 ppm in β-Ga<sub>2</sub>O<sub>3</sub>. The structural defects caused by the Cr doping interrupt the movement of indentation induced dislocations that results in the increase of hardness of the Cr doped β-Ga<sub>2</sub>O<sub>3</sub> (100) single crystals.</p>\",\"PeriodicalId\":473,\"journal\":{\"name\":\"Applied Physics A\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.5000,\"publicationDate\":\"2024-09-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Applied Physics A\",\"FirstCategoryId\":\"4\",\"ListUrlMain\":\"https://doi.org/10.1007/s00339-024-07870-4\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Physics A","FirstCategoryId":"4","ListUrlMain":"https://doi.org/10.1007/s00339-024-07870-4","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Structural, optical and mechanical properties of Cr doped β-Ga2O3 single crystals
Undoped and Cr doped β-Ga2O3 (100) single crystals are grown by optical floating zone method. The full width at half maximum of rocking curve is found to be 106 arc.sec for undoped β-Ga2O3 crystals whereas the 100 and 200 ppm of Cr doped β-Ga2O3 crystals display multiple rocking curves with large peak widths indicating the presence of structural defects. Raman measurements reveal broadening in the vibrational mode of ~ 350 cm− 1 with a shoulder peak indicating the Cr3+ dopants preferentially substitute for Ga3+ at the octahedral sites. Further, the Cr doped β-Ga2O3 crystals display strong optical absorption bands about 420 and 597 nm in the UV-Vis spectroscopy. Moreover, the observation of sharp characteristic photoluminescence emission lines at 690 and 697 nm also confirms the Cr substitution in the doped crystals. The indentation hardness increases nearly linear from 13.0 ± 0.6 to 17.9 ± 0.4 GPa whilst the indentation modulus decreases from 224.9 ± 21.4 to 202.4 ± 11.9 GPa upon Cr doping of 200 ppm in β-Ga2O3. The structural defects caused by the Cr doping interrupt the movement of indentation induced dislocations that results in the increase of hardness of the Cr doped β-Ga2O3 (100) single crystals.
期刊介绍:
Applied Physics A publishes experimental and theoretical investigations in applied physics as regular articles, rapid communications, and invited papers. The distinguished 30-member Board of Editors reflects the interdisciplinary approach of the journal and ensures the highest quality of peer review.