Regensburg 2016 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 17: Poster Session I
MA 17.79: Poster
Dienstag, 8. März 2016, 09:30–12:30, Poster B1
Single crystal growth and magnetic anisotropy of transition metal substituted Li3N — •Manuel Fix1, Stephan Jantz2, and Anton Jesche1 — 1EP 6, Electronic Correlations and Magnetism, University of Augsburg, Germany — 2Solid State Chemistry, Insitute of Physics, University of Augsburg, Germany
The compounds Li2(Li1−xTx)N where T = {Mn, Fe, Co and Ni} show a highly anisotropic behaviour of their magnetic properties resulting from large orbital contributions to the magnetic moment of the transition metals [1]. Moreover, dilute Fe-substitution in Li3N leads to a quantum tunnelling of the magnetization similar to single-molecule magnets [2].
Here we show the growth of single crystals of Fe- and Ni-substituted Li3N via a flux method. Single crystals of several millimetres along a side could be obtained. The samples were characterized structurally by powder X-Ray diffraction and Laue back-reflection and chemical analysis was performed via ICP-OES. To prevent degradation of the extremely air-sensitive samples, the growth as well as the characterization were performed under inert atmosphere. We present the magnetic properties obtained by measurements of isothermal and temperature-dependent AC and DC magnetization. Furthermore, the influence of a static external magnetic field on the quantum tunnelling of the magnetization and on thermally activated relaxation processes in Li2(Li1−xFex)N is discussed.
A. Jesche et al., Phys. Rev. B 91, 180403(R) (2015)
A. Jesche et al., Nature Comm. 5:3333 (2014)