Berlin 2018 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 72: Poster Session: Correlated Electrons
TT 72.48: Poster
Mittwoch, 14. März 2018, 15:00–19:00, Poster B
Magnetisation of lithium nitridometalates and magnetite nanoparticles upon electrochemical cycling — •Elisa Thauer1, Michael Richter1, Manuel Fix2, Anton Jesche2, and Rüdiger Klingeler1,3 — 1Kirchhoff Institute for Physics,, Heidelberg University, 69120 Heidelberg, Germany — 2EP VI, Center for Electronic Correlations and Magnetism, Augsburg University, 86159 Augsburg, Germany — 3Center for Advanced Materials, 69120 Heidelberg University, Heidelberg, Germany
We report in-situ and ex-situ studies of the magnetic properties of lithium nitridometalates and magnetite nanoparticles upon electrochemical treatment. In Li2Li1−xMxN with M = Fe or Ni, the effect of delithiation, i.e. electrochemical change of the valence of the transition metal ions, on the magnetic properties was studied by means of ex-situ SQUID magnetometry. In case of Li2.7Fe0.3N the initial hard magnetic ground state is suppressed by delithiation. In addition, a re-usable in-situ electrochemical cell was designed for operation in the SQUID magnetometer. Studies on Fe3O4 nanoparticles prove significant changes of the magnetisation upon electrochemical lithiation and delithiation.