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Abstract: We investigated the optical properties (absorption, luminescence and Raman spectra) of nanopolycrystalline diamond (NPD) aiming at exploring its capabilities as a pressure sensor and as a pressure-cell anvil for combined X-ray/neutron and optical studies. Notably, we analysed the Raman peak shift and broadening with pressure using a Moissanite Anvil Cell (MAC). The results are compared with those obtained in a DAC, where Raman signals from NPD chips and diamond anvils strongly overlap. Its pressure behaviour in the hydrostatic and non-hydrostatic regimes were investigated. We showed that the nanopolycrystalline structure induces remarkable differences in the peak shift and broadening between NPD and natural type IIa single-crystal diamond, making NPD suitable as pressure gauge for pressure determination and testing hydrostaticity of pressure transmitting medium.
Fuente: High Pressure Research, 2020, 40(1), 107-118
Publisher: Taylor & Francis
Year of publication: 2020
No. of pages: 12
Publication type: Article
DOI: 10.1080/08957959.2019.1702173
ISSN: 0895-7959,1026-7522
Spanish project: MAT2015-69508-P
Publication Url: https://doi.org/10.1080/08957959.2019.1702173
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JOSE ANTONIO BARREDA ARGÜESO
JESUS ANTONIO GONZALEZ GOMEZ
RAFAEL VALIENTE BARROSO
IRIFUNE, TETSUO
FERNANDO RODRIGUEZ GONZALEZ
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