Berlin 2018 – scientific programme
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SYVC: Symposium Voltage Control of Functional Interfaces: Magneto-ionic Meet Memristive Systems
SYVC 1: SYVC: Voltage Control of Functional Interfaces – Magneto-ionic Meet Memristive Systems
SYVC 1.4: Invited Talk
Wednesday, March 14, 2018, 17:00–17:30, H 0105
In-situ and operando SQUID magnetometry under electrochemical control — •Roland Würschum1, Markus Gößler1, Gregor Klinser1, Eva-Maria Steyskal1, and Heinz Krenn2 — 1Inst. of Mater. Phys., TU Graz, Austria — 2Inst. of Phys., Univ. Graz
In the research field of voltage-controlled functional materials, an attractive pathway is currently opening up with the the development of in-situ electrochemical techniques for SQUID magnetometry [1]. This combines the high SQUID sensitivity with the electrochemical tools for electronic and chemical controlling of surfaces by means of double layer charging, oxidation and reduction, electrochemical loading and extraction, as well as thin-film deposition. An overview will be given on our recent studies in this field comprising, on the one hand, the in-situ electrodeposition of thin Co films [2] as well as charging-induced variations of the magnetic moment of nanophase metals [3]. Moreover, reduction and oxidation processes of transistion metal oxides were in-situ monitored upon electrochemical insertion and extraction of Li, serving as highly sensitive fingerprint for the charge state of electrode materials [4]. Finally, the electrochemical charging-induced variation of the electrical resistance of nanophase and nanoporous metals will be addressed [5]. Acknowledgment: This work is financially supported by the Austrian Science Fund (FWF): P30070-N36.
[1] S. Topolovec et al., Rev.Sci.Instr. 86 (2015) 063903. [2] S. Topolovec et al., JMMM 397 (2016) 96. [3] E.-M. Steyskal et al., Beilst.J.Nanotech. 4 ( 2013) 394. [4] G. Klinser et al., APL 109 (2016) 213901. [5] E.-M. Steyskal et al., Langmuir 32 (2016) 7757.