Berlin 2018 – wissenschaftliches Programm

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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: Hauptvortrag

Mittwoch, 14. März 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 Krenn21Inst. 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.

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