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- W4384199785 abstract "The magnetic properties of tetragonal $ensuremath{alpha}text{ensuremath{-}}{mathrm{Mn}}_{3}{mathrm{O}}_{4}$ spinel, its metastable high-pressure modification $ensuremath{gamma}text{ensuremath{-}}{mathrm{Mn}}_{3}{mathrm{O}}_{4}$, and of an $ensuremath{alpha}text{ensuremath{-}}{mathrm{Mn}}_{3}{mathrm{O}}_{4}$ modification with a high amount of lattice defects were investigated by direct current (dc) and alternating current (ac) magnetometry as well as by heat capacity measurements. An $ensuremath{alpha}text{ensuremath{-}}{mathrm{Mn}}_{3}{mathrm{O}}_{4}$ phase modification with a high amount of lattice defects instead of the desired metastable high pressure $ensuremath{gamma}text{ensuremath{-}}{mathrm{Mn}}_{3}{mathrm{O}}_{4}$ phase might unintentionally be obtained after the high-pressure application. The obtained results clarify strongly contradictory reports about the dc susceptibility data of $ensuremath{gamma}text{ensuremath{-}}{mathrm{Mn}}_{3}{mathrm{O}}_{4}$ in the literature. Further, in situ low-temperature x-ray diffraction experiments from 150 to 275 K and Mn K-edge x-ray absorption spectroscopy experiments at 80 and 300 K do not indicate any structural transition to be coupled with the magnetic transition at 210 K for the given $ensuremath{gamma}text{ensuremath{-}}{mathrm{Mn}}_{3}{mathrm{O}}_{4}$ sample. This is in contradiction with what was concluded from powder neutron diffraction alone in the literature, where a coupled structural transition accompanied with large atomic displacements of a Mn species was claimed to be accompanied to the magnetic transition." @default.
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- W4384199785 title "Structure and magnetic properties of hausmannite <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mi>α</mml:mi><mml:mtext>−</mml:mtext><mml:msub><mml:mi>Mn</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi mathvariant=normal>O</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:mrow></mml:math> , metastable high-pressure marokite <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mi>γ</mml:mi><mml:mtext>−</mml:mtext><mml:msub><mml:mi>Mn</mml:mi><mml:mn>…" @default.
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- W4384199785 doi "https://doi.org/10.1103/physrevb.108.014417" @default.
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