Berlin 2018 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

TT: Fachverband Tiefe Temperaturen

TT 72: Poster Session: Correlated Electrons

TT 72.48: Poster

Wednesday, March 14, 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 Klingeler^1,3 — 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 Li₂Li_1−xM_xN 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 Li_2.7Fe_0.3N 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.