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The Parent Li(OH)FeSe Phase of Lithium Iron Hydroxide Selenide Superconductors

DOI: 10.1021/acs.inorgchem.6b01734 DOI Help

Authors: Daniel N. Woodruff (University of Oxford) , Francesca Schild (Department of Chemistry, University of Oxford) , Craig V. Topping (University of Oxford) , Simon J. Cassidy (University of Oxford) , Jack N. Blandy (University of Oxford; Diamond Light Source) , Stephen J. Blundell (Department of Physics, University of Oxford) , Amber L. Thompson (University of Oxford) , Simon J. Clarke (Department of Chemistry, University of Oxford)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Inorganic Chemistry

State: Published (Approved)
Published: September 2016
Diamond Proposal Number(s): 12763 , 13284 , 13639

Abstract: Lithiation of hydrothermally synthesized Li1–xFex(OH)Fe1–ySe turns on high-temperature superconductivity when iron ions are displaced from the hydroxide layers by reductive lithiation to fill the vacancies in the iron selenide layers. Further lithiation results in reductive iron extrusion from the hydroxide layers, which turns off superconductivity again as the stoichiometric composition Li(OH)FeSe is approached. The results demonstrate the twin requirements of stoichiometric FeSe layers and reduction of Fe below the +2 oxidation state as found in several iron selenide superconductors.

Subject Areas: Chemistry, Physics, Technique Development

Instruments: I11-High Resolution Powder Diffraction , I12-JEEP: Joint Engineering, Environmental and Processing , I19-Small Molecule Single Crystal Diffraction

Added On: 30/09/2016 15:25

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