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Abstract
We have successfully synthesized and investigated the compound with a
space group. By chemical doping, we substituted gallium element with germanium element in the system. The solubility limit of germanium element is about
= 0.25 in
. The lattice parameter of
-axis becomes larger, while
-axis becomes smaller with doping germanium. In Cr
GaN, there is a phase transition at 170 K as revealed by both resistivity and magnetic susceptibility measurements at ambient pressure, this transition could correspond to a possible spin-density wave ordering transition. The electrical transport and magnetic behaviours show very similar properties to that of the parent compounds of iron-based superconductors. By doping germanium to the system, the possible SDW transition was successfully suppressed. While with the application of a hydrostatic pressure up to 1.1 GPa, the transition temperature does not show a clear change. No superconductivity was observed in either Ge-doped sample or under a hydrostatic pressure.
Acknowledgements
The author thanks Xiang Ma and Dong Sheng for EDX element analysis.
Notes
No potential conflict of interest was reported by the authors.