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Helical magnetic state in the distorted triangular lattice of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>α</mml:mi></mml:mrow></mml:math>-CaCr<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow /><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>O<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow /><mml:mrow><mml:mn>4</mml…
The magnetic properties of the high temperature $\ensuremath{\alpha}$ form of the CaCr${}_{2}$O${}_{4}$ compound have been investigated for the first time by magnetic susceptibility, specific heat, and powder neutron diffraction. The system undergoes a unique magnetic phase transition at 43 K to a long-range ordered incommensurate helical phase with magnetic propagation …