RAMAN-SCATTERING STUDY OF PHASE-TRANSITIONS IN RBCAF-3
Recent experiments on RbCaF3 have indicated the occurence of structural phase transitions at low temperature. The Raman data presented here confirm the transition at 200 K to be similar to the cubic-tetragonal transition occuring in SrTiO3 and KMnF3: soft modes of A1g and Eg symmetry are observed an...
| Main Authors: | , |
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| Format: | Journal article |
| Language: | English |
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1976
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| _version_ | 1797084635058929664 |
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| author | Rushworth, A Ryan, J |
| author_facet | Rushworth, A Ryan, J |
| author_sort | Rushworth, A |
| collection | OXFORD |
| description | Recent experiments on RbCaF3 have indicated the occurence of structural phase transitions at low temperature. The Raman data presented here confirm the transition at 200 K to be similar to the cubic-tetragonal transition occuring in SrTiO3 and KMnF3: soft modes of A1g and Eg symmetry are observed and the spectrum is consistent with D4h crystal symmetry. At 45 K the frequency and damping of the A1g mode begin to increase with further decrease in temperature, both of which suggest the the emergence of a new low-frequency mode of A1 symmetry at this temperature. © 1976. |
| first_indexed | 2024-03-07T01:57:51Z |
| format | Journal article |
| id | oxford-uuid:9c53d401-0ef2-4d34-b1fb-5a5779286e33 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T01:57:51Z |
| publishDate | 1976 |
| record_format | dspace |
| spelling | oxford-uuid:9c53d401-0ef2-4d34-b1fb-5a5779286e332022-03-27T00:35:13ZRAMAN-SCATTERING STUDY OF PHASE-TRANSITIONS IN RBCAF-3Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:9c53d401-0ef2-4d34-b1fb-5a5779286e33EnglishSymplectic Elements at Oxford1976Rushworth, ARyan, JRecent experiments on RbCaF3 have indicated the occurence of structural phase transitions at low temperature. The Raman data presented here confirm the transition at 200 K to be similar to the cubic-tetragonal transition occuring in SrTiO3 and KMnF3: soft modes of A1g and Eg symmetry are observed and the spectrum is consistent with D4h crystal symmetry. At 45 K the frequency and damping of the A1g mode begin to increase with further decrease in temperature, both of which suggest the the emergence of a new low-frequency mode of A1 symmetry at this temperature. © 1976. |
| spellingShingle | Rushworth, A Ryan, J RAMAN-SCATTERING STUDY OF PHASE-TRANSITIONS IN RBCAF-3 |
| title | RAMAN-SCATTERING STUDY OF PHASE-TRANSITIONS IN RBCAF-3 |
| title_full | RAMAN-SCATTERING STUDY OF PHASE-TRANSITIONS IN RBCAF-3 |
| title_fullStr | RAMAN-SCATTERING STUDY OF PHASE-TRANSITIONS IN RBCAF-3 |
| title_full_unstemmed | RAMAN-SCATTERING STUDY OF PHASE-TRANSITIONS IN RBCAF-3 |
| title_short | RAMAN-SCATTERING STUDY OF PHASE-TRANSITIONS IN RBCAF-3 |
| title_sort | raman scattering study of phase transitions in rbcaf 3 |
| work_keys_str_mv | AT rushwortha ramanscatteringstudyofphasetransitionsinrbcaf3 AT ryanj ramanscatteringstudyofphasetransitionsinrbcaf3 |