Strain engineered pyrochlore at high pressure
Abstract Strain engineering is a promising method for next-generation materials processing techniques. Here, we use mechanical milling and annealing followed by compression in diamond anvil cell to tailor the intrinsic and extrinsic strain in pyrochlore, Dy2Ti2O7 and Dy2Zr2O7. Raman spectroscopy, X-...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2017-05-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-017-02637-9 |
| _version_ | 1818994252503318528 |
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| author | Dylan R. Rittman Katlyn M. Turner Sulgiye Park Antonio F. Fuentes Changyong Park Rodney C. Ewing Wendy L. Mao |
| author_facet | Dylan R. Rittman Katlyn M. Turner Sulgiye Park Antonio F. Fuentes Changyong Park Rodney C. Ewing Wendy L. Mao |
| author_sort | Dylan R. Rittman |
| collection | DOAJ |
| description | Abstract Strain engineering is a promising method for next-generation materials processing techniques. Here, we use mechanical milling and annealing followed by compression in diamond anvil cell to tailor the intrinsic and extrinsic strain in pyrochlore, Dy2Ti2O7 and Dy2Zr2O7. Raman spectroscopy, X-ray pair distribution function analysis, and X-ray diffraction were used to characterize atomic order over short-, medium-, and long-range spatial scales, respectively, under ambient conditions. Raman spectroscopy and X-ray diffraction were further employed to interrogate the material in situ at high pressure. High-pressure behavior is found to depend on the species and concentration of defects in the sample at ambient conditions. Overall, we show that defects can be engineered to lower the phase transformation onset pressure by ~50% in the ordered pyrochlore Dy2Ti2O7, and lower the phase transformation completion pressure by ~20% in the disordered pyrochlore Dy2Zr2O7. These improvements are achieved without significantly sacrificing mechanical integrity, as characterized by bulk modulus. |
| first_indexed | 2024-12-20T20:55:00Z |
| format | Article |
| id | doaj.art-a112705d991542378b0c333923486d39 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-20T20:55:00Z |
| publishDate | 2017-05-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-a112705d991542378b0c333923486d392022-12-21T19:26:51ZengNature PortfolioScientific Reports2045-23222017-05-017111010.1038/s41598-017-02637-9Strain engineered pyrochlore at high pressureDylan R. Rittman0Katlyn M. Turner1Sulgiye Park2Antonio F. Fuentes3Changyong Park4Rodney C. Ewing5Wendy L. Mao6Department of Geological Sciences, Stanford UniversityDepartment of Geological Sciences, Stanford UniversityDepartment of Geological Sciences, Stanford UniversityCinvestav Unidad SaltilloHigh Pressure Collaborative Access Team, Geophysical Laboratory, Carnegie Institution of WashingtonDepartment of Geological Sciences, Stanford UniversityDepartment of Geological Sciences, Stanford UniversityAbstract Strain engineering is a promising method for next-generation materials processing techniques. Here, we use mechanical milling and annealing followed by compression in diamond anvil cell to tailor the intrinsic and extrinsic strain in pyrochlore, Dy2Ti2O7 and Dy2Zr2O7. Raman spectroscopy, X-ray pair distribution function analysis, and X-ray diffraction were used to characterize atomic order over short-, medium-, and long-range spatial scales, respectively, under ambient conditions. Raman spectroscopy and X-ray diffraction were further employed to interrogate the material in situ at high pressure. High-pressure behavior is found to depend on the species and concentration of defects in the sample at ambient conditions. Overall, we show that defects can be engineered to lower the phase transformation onset pressure by ~50% in the ordered pyrochlore Dy2Ti2O7, and lower the phase transformation completion pressure by ~20% in the disordered pyrochlore Dy2Zr2O7. These improvements are achieved without significantly sacrificing mechanical integrity, as characterized by bulk modulus.https://doi.org/10.1038/s41598-017-02637-9 |
| spellingShingle | Dylan R. Rittman Katlyn M. Turner Sulgiye Park Antonio F. Fuentes Changyong Park Rodney C. Ewing Wendy L. Mao Strain engineered pyrochlore at high pressure Scientific Reports |
| title | Strain engineered pyrochlore at high pressure |
| title_full | Strain engineered pyrochlore at high pressure |
| title_fullStr | Strain engineered pyrochlore at high pressure |
| title_full_unstemmed | Strain engineered pyrochlore at high pressure |
| title_short | Strain engineered pyrochlore at high pressure |
| title_sort | strain engineered pyrochlore at high pressure |
| url | https://doi.org/10.1038/s41598-017-02637-9 |
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