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Coexistence of the long-range and short-range magnetic order components in SrEr<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mn>2</mml:mn></mml:msub></mml:math>O<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mn>4</mml:mn></mml:msub></mml:math>
Single-crystal neutron diffraction reveals two distinct components to the magnetic ordering in geometrically frustrated ${\mathrm{SrEr}}_{2}{\mathrm{O}}_{4}$. One component is a long-range ordered $\mathbf{k}=0$ structure which appears below ${T}_{N}=0.75$ K. Another component is a short-range incommensurate structure which manifests itself by the presence of a strong diffuse scattering signal. On cooling from …