Speller, Susie - University of Oxford - Department of Materials

研究领域

The Superconducting Materials research group focusses on relationships between processing, microstructure and properties of a wide range of superconducting materials. A major part of our current research activity is associated with the Oxford Centre for Applied Superconductivity (CfAS) and involves working closely with local industrial partners to address materials challenges in the superconducting magnet industry, such as superconducting joints. In addition, we specialise in the processing and characterisation of thin films, and have a new research intersest in superconducting nitride materials for quantum device applications as well as an ongoing activity supplying Tl-based high temperature superconducting films to research collaborators. On the more fundamental side, I use advanced microstructural characterisation techniques including High-Resolution Electron Backscatter Diffraction (HR-EBSD) and synchrotron microscopy (e.g nanoARPES, PEEM) to study homogeneity and phase separation in single crystals of novel Fe-based superconductors. Understanding the interplay between magnetism and superconductivity in these materials is thought to be of crucial importance for discovering the elusive mechanism for high-temperature superconductivity.

近期论文

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Goodfellow, A; Shi, Y-H; Durrell, JH; Dennis, AR; Cardwell, DA; Grovenor CRM; Speller, SC “Microstructural evolution in multiseeded YBCO bulk samples grown by the TSMG process” Superconductor Science and Technology 29, 115005 (2016) Aksoy, C; Mousavi, T; Brittles, G; Grovenor, CRM; Speller, SC. “Lead-free solders for superconducting applications”, IEEE trans. Appl. Supercond. 26(3) 7428882 (2016) Brittles, G; Aksoy, C; Grovenor, CRM; Bradshaw, T; Milward and Speller, SC. “Microstructural properties and magnetic testing of spot-welded joints between Nb-Ti filaments”. IEEE trans. Appl. Supercond. 26(3) 7405257 (2016) Mousavi, T; Aksoy, C; Grovenor, CRM; Speller, SC. “Phase evolution of superconducting Sn-In-Bi solder alloys”. IEEE trans. Appl. Supercond. 26(3) 7372426 (2016) Mousavi, T; Aksoy, C; Grovenor, CRM; Speller, SC. “Microstructure of superconducting properties of Sn-In and Sn-In-Bi alloys as Pb-free solders”. Supercond. Sci. Technol. 29 015012 (2016) Speller, SC; Mousavi, T; Dudin, P. “Analytical microscopy of iron-based superconducting materials”, Novel Superconducting Materials, 1:29-36 (2015) Brittles, GD; Mousavi, T; Grovenor, CRM; Aksoy, C; Speller, SC. “Persistent current joints between technological superconductors”, Superconduct. Sci. Technol. 28(9) 093001 (2015). Mousavi, T; Grovenor, C; Speller, S. “Characterization of superconducting Fey(Se1-xTex) thin films deposited on MgO substrates by sputtering”, J. Mater. Sci. 50-6970-6978 (2015) Grant, PS; Castles, F; Lei, Q; Wang, Y: Janurudin, JM; Isakov, D; Speller, S; Dancer, C; Grovenor, CRM. “Manufacture of electrical and magnetic graded and anisotropic materials for novel manipulations of microwaves”, Phil. Trans. A 373: 20140353 Mousavi, T; Grovenor, CRM; Speller, SC, “Effects of processing conditions on the properties of Fe(Se,Te) thin films grown by sputtering”, IEEE Trans. Appl. Supercond. 25(3) 7500604 (2015) Collins-McIntyre, LJ; Wang, W; Zhou, B; Speller, SC; Chen, YL; Hesjedal, T; DOI:10.1002/pssb.201552003 (2015) Brittles, GD; Grovenor, CRM; Noonan, P; Keys, S; Speller, SC. “Rapid characterisation of persistent current joints by SQUID magnetometry”, Superconductor Science and Technology, 27(12) 122002 (2014) Mousavi, T; Grovenor, CRM; Speller, SC, “Structural parameters affecting superconductivity in iron chalcogenides: review” Materials Science and Technology 30(15) 1929 (2014)