This title appears in the Scientific Report :
2019
Topotactic transition mechanisms in SrCoO$_{2.5+š„}$ films
Topotactic transition mechanisms in SrCoO$_{2.5+š„}$ films
Strontium cobaltite (SrCoO3āšæ) exists in two topotactic phases, depending on the oxygen content. SrCoO3 is a ferromagnetic metal (Tš¶=305K) with perovskite structure while SrCoO2.5 is an antiferromagnetic insulator(Tš=570K) with brownmillerite structure. Because of the multivalent Co states and high...
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Personal Name(s): | Schƶffmann, Patrick (Corresponding author) |
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PĆ¼tter, Sabine / Sarkar, Anirban / Syed Mohd, Amir / Waschk, Markus / Bhatnagar, Tanvi / Zakalek, Paul / BrĆ¼ckel, Thomas | |
Contributing Institute: |
Heinz Maier-Leibnitz Zentrum; MLZ Streumethoden; PGI-4 Physik Nanoskaliger Systeme; ER-C-1 Streumethoden; JCNS-2 JCNS-FRM-II; JCNS-FRM-II |
Imprint: |
2019
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Conference: | DPG-FrĆ¼hjahrstagung der Sektion Kondensierte Materie, Regensburg (Germany), 2019-03-31 - 2019-04-05 |
Document Type: |
Conference Presentation |
Research Program: |
JĆ¼lich Centre for Neutron Research (JCNS) FRM II / MLZ Quantum Condensed Matter: Magnetism, Superconductivity Controlling Collective States |
Subject (ZB): | |
Publikationsportal JuSER |
Strontium cobaltite (SrCoO3āšæ) exists in two topotactic phases, depending on the oxygen content. SrCoO3 is a ferromagnetic metal (Tš¶=305K) with perovskite structure while SrCoO2.5 is an antiferromagnetic insulator(Tš=570K) with brownmillerite structure. Because of the multivalent Co states and high oxygen mobility it is a promising material for energy and information applications [1]. To control the oxygen content, several possibilites exist. We focus on annealing in oxidising conditions and applying variable strain with a piezoelectric substrate to the film. We grow thin films of SrCoO2.5 by molecular beam epitaxy on various substrates including a piezoelectric with a conducting buffer layer. To be able to transfer strain from the substrate to the film, a highsample quality and epitaxy is mandatory, thus we present the results of the film growth and quality, as well as first results of the magnetic characterisation by SQUID and neutron reflectometry. [1] H. Jeen et al., Nature Materials 12, 2013 |