Single-step synthesis and crystal structure of HgBa2CuO4+delta with a T-c of 97 K
Single-phase samples of HgBa2CuO4+δ (Hg-1201) have been synthesised from a reaction between a pre-synthesised precursor Ba2CuO3 and HgO, using a rapid-heat rapid-cool technique. This method yields high-quality samples with (as-synthesised) superconducting transition temperatures, Tc up to 97 K, as d...
| Main Authors: | , , , |
|---|---|
| Format: | Journal article |
| Language: | English |
| Published: |
1995
|
| _version_ | 1826295009483161600 |
|---|---|
| author | Asab, A Armstrong, A Gameson, I Edwards, P |
| author_facet | Asab, A Armstrong, A Gameson, I Edwards, P |
| author_sort | Asab, A |
| collection | OXFORD |
| description | Single-phase samples of HgBa2CuO4+δ (Hg-1201) have been synthesised from a reaction between a pre-synthesised precursor Ba2CuO3 and HgO, using a rapid-heat rapid-cool technique. This method yields high-quality samples with (as-synthesised) superconducting transition temperatures, Tc up to 97 K, as defined by the onset of diamagnetism. The phase purity and crystal structure were identified by powder X-ray diffraction. In addition, powder neutron diffraction was employed to elucidate the structure, particularly the interstitial O3 site, which provides the "holes" required for inducing superconductivity in this material. We observe some disorder in this material, including the displacement of the O3 site from its ideal (0.5, 0.5, 0) position; this has not been observed in previous studies. A fourth oxygen site, labelled here O4, was located between two copper sites at (0.086, 0.5, 0). © 1995. |
| first_indexed | 2024-03-07T03:54:31Z |
| format | Journal article |
| id | oxford-uuid:c26992da-711f-4f93-9219-d4ea04cfd36e |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T03:54:31Z |
| publishDate | 1995 |
| record_format | dspace |
| spelling | oxford-uuid:c26992da-711f-4f93-9219-d4ea04cfd36e2022-03-27T06:08:43ZSingle-step synthesis and crystal structure of HgBa2CuO4+delta with a T-c of 97 KJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:c26992da-711f-4f93-9219-d4ea04cfd36eEnglishSymplectic Elements at Oxford1995Asab, AArmstrong, AGameson, IEdwards, PSingle-phase samples of HgBa2CuO4+δ (Hg-1201) have been synthesised from a reaction between a pre-synthesised precursor Ba2CuO3 and HgO, using a rapid-heat rapid-cool technique. This method yields high-quality samples with (as-synthesised) superconducting transition temperatures, Tc up to 97 K, as defined by the onset of diamagnetism. The phase purity and crystal structure were identified by powder X-ray diffraction. In addition, powder neutron diffraction was employed to elucidate the structure, particularly the interstitial O3 site, which provides the "holes" required for inducing superconductivity in this material. We observe some disorder in this material, including the displacement of the O3 site from its ideal (0.5, 0.5, 0) position; this has not been observed in previous studies. A fourth oxygen site, labelled here O4, was located between two copper sites at (0.086, 0.5, 0). © 1995. |
| spellingShingle | Asab, A Armstrong, A Gameson, I Edwards, P Single-step synthesis and crystal structure of HgBa2CuO4+delta with a T-c of 97 K |
| title | Single-step synthesis and crystal structure of HgBa2CuO4+delta with a T-c of 97 K |
| title_full | Single-step synthesis and crystal structure of HgBa2CuO4+delta with a T-c of 97 K |
| title_fullStr | Single-step synthesis and crystal structure of HgBa2CuO4+delta with a T-c of 97 K |
| title_full_unstemmed | Single-step synthesis and crystal structure of HgBa2CuO4+delta with a T-c of 97 K |
| title_short | Single-step synthesis and crystal structure of HgBa2CuO4+delta with a T-c of 97 K |
| title_sort | single step synthesis and crystal structure of hgba2cuo4 delta with a t c of 97 k |
| work_keys_str_mv | AT asaba singlestepsynthesisandcrystalstructureofhgba2cuo4deltawithatcof97k AT armstronga singlestepsynthesisandcrystalstructureofhgba2cuo4deltawithatcof97k AT gamesoni singlestepsynthesisandcrystalstructureofhgba2cuo4deltawithatcof97k AT edwardsp singlestepsynthesisandcrystalstructureofhgba2cuo4deltawithatcof97k |