On the role of transition metal elements as structure-stabilising agents in cuprate superconductors
We outline here several key aspects of the crystal chemistry of (high-valent) transition metal-stabilised cuprate superconductors. An examination of the chemistry of the mercurocuprate homologous series HgBa2Can-1CunO2n+2+δ leads us to propose that the inherent instability of the analogous strontium...
| Main Authors: | , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
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1999
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| _version_ | 1826288476571566080 |
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| author | Hyatt, N Peacock, G Gameson, I Moran, K Slaski, M Jones, M Ellis, A Gold, Y Dupree, R Edwards, P |
| author_facet | Hyatt, N Peacock, G Gameson, I Moran, K Slaski, M Jones, M Ellis, A Gold, Y Dupree, R Edwards, P |
| author_sort | Hyatt, N |
| collection | OXFORD |
| description | We outline here several key aspects of the crystal chemistry of (high-valent) transition metal-stabilised cuprate superconductors. An examination of the chemistry of the mercurocuprate homologous series HgBa2Can-1CunO2n+2+δ leads us to propose that the inherent instability of the analogous strontium system (HgSr2Can-1CunO2n+2+δ) arises from bond-length mismatch at the interface between the rock-salt and perovskite layers. A simple set of principles can now be formalised for the stabilisation of strontium mercurocuprates via partial substitution of mercury by a high-valent transition metal within the crystal structure of interest. The chemistry of three different cuprate systems, in which high-valent transition metal ions adopt a pivotal role as structure-stabilising agents, are illustrated here. First, we demonstrate how a combination of structural stabilisation (by the substitution of rhenium onto the mercury site) combined with control of the copper oxidation state (via judicious control of the Nd3+:Ca2+ ratio), allows the successful synthesis of superconducting strontium analogues of HgBa2CaCu2O6+δ in the (Hg1-xRex)Sr2(Nd1-yCa y)Cu2O6+δ system. Second, we report the successful preparation of superconducting Hg1-xCrxSr2CuO4+δ thin films, by laser ablation and ex situ mercuration. Finally, we describe a new family of layered cuprates with the general chemical formula (Cu1-xTMx)Sr2(Y1.2Ce 0.8)Cu2O10-δ, with TM=Ti, Cr, Mo, W, V and Re, in which these transition metal substituents, once again, fulfil a key role in structure stabilisation. © Elsevier Science Ltd. |
| first_indexed | 2024-03-07T02:14:17Z |
| format | Journal article |
| id | oxford-uuid:a1b0598c-2ab4-47b6-8496-6c82d8a65f81 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T02:14:17Z |
| publishDate | 1999 |
| record_format | dspace |
| spelling | oxford-uuid:a1b0598c-2ab4-47b6-8496-6c82d8a65f812022-03-27T02:14:58ZOn the role of transition metal elements as structure-stabilising agents in cuprate superconductorsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:a1b0598c-2ab4-47b6-8496-6c82d8a65f81EnglishSymplectic Elements at Oxford1999Hyatt, NPeacock, GGameson, IMoran, KSlaski, MJones, MEllis, AGold, YDupree, REdwards, PWe outline here several key aspects of the crystal chemistry of (high-valent) transition metal-stabilised cuprate superconductors. An examination of the chemistry of the mercurocuprate homologous series HgBa2Can-1CunO2n+2+δ leads us to propose that the inherent instability of the analogous strontium system (HgSr2Can-1CunO2n+2+δ) arises from bond-length mismatch at the interface between the rock-salt and perovskite layers. A simple set of principles can now be formalised for the stabilisation of strontium mercurocuprates via partial substitution of mercury by a high-valent transition metal within the crystal structure of interest. The chemistry of three different cuprate systems, in which high-valent transition metal ions adopt a pivotal role as structure-stabilising agents, are illustrated here. First, we demonstrate how a combination of structural stabilisation (by the substitution of rhenium onto the mercury site) combined with control of the copper oxidation state (via judicious control of the Nd3+:Ca2+ ratio), allows the successful synthesis of superconducting strontium analogues of HgBa2CaCu2O6+δ in the (Hg1-xRex)Sr2(Nd1-yCa y)Cu2O6+δ system. Second, we report the successful preparation of superconducting Hg1-xCrxSr2CuO4+δ thin films, by laser ablation and ex situ mercuration. Finally, we describe a new family of layered cuprates with the general chemical formula (Cu1-xTMx)Sr2(Y1.2Ce 0.8)Cu2O10-δ, with TM=Ti, Cr, Mo, W, V and Re, in which these transition metal substituents, once again, fulfil a key role in structure stabilisation. © Elsevier Science Ltd. |
| spellingShingle | Hyatt, N Peacock, G Gameson, I Moran, K Slaski, M Jones, M Ellis, A Gold, Y Dupree, R Edwards, P On the role of transition metal elements as structure-stabilising agents in cuprate superconductors |
| title | On the role of transition metal elements as structure-stabilising agents in cuprate superconductors |
| title_full | On the role of transition metal elements as structure-stabilising agents in cuprate superconductors |
| title_fullStr | On the role of transition metal elements as structure-stabilising agents in cuprate superconductors |
| title_full_unstemmed | On the role of transition metal elements as structure-stabilising agents in cuprate superconductors |
| title_short | On the role of transition metal elements as structure-stabilising agents in cuprate superconductors |
| title_sort | on the role of transition metal elements as structure stabilising agents in cuprate superconductors |
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