Bulk magnetic order in a two dimensional Ni1+/Ni2+ (d9/d8) nickelate, isoelectronic with superconducting cuprates
Poltavets, Viktor V. · Lokshin, Konstantin A. · Egami, Takeshi · Nevidomskyy, Andriy H. · Croft, Mark · Kotliar, Gabriel · Tyson, Trevor A. · Hadermann, Joke · Van Tendeloo, Gustaaf · ApRoberts-Warren, Nicholas · Dioguardi, Adam P. · Curro, Nicholas J. · Greenblatt, Martha
Original · EN
Bulk magnetic order in two dimensional La4Ni3O8 nickelate with Ni1+/Ni2+ (d9/d8), isoelectronic with superconducting cuprates is demonstrated experimentally and theoretically. Magnetization, specific heat and 139La NMR evidence a transition at 105 K to an antiferromagnetic state. Theoretical calculations by DFT relate the transition to a nesting instability of the Fermi surface with ordering wave-vector Q = [1/3, 1/3, 0].
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