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Incommensurate geometry of the elastic magnetic peaks in superconducting<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">La</mml:mi></mml:mrow><mml:mrow><mml:mn>1.88</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Sr</mml:mi></mml:mrow><mml:mrow><mml:mn>0.12</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">CuO…
We report magnetic neutron-scattering measurements of incommensurate magnetic order in a superconducting single crystal of ${\mathrm{La}}_{1.88}{\mathrm{Sr}}_{0.12}{\mathrm{CuO}}_{4}.$ We find that the incommensurate wave vectors which describe the static magnetism do not lie along high-symmetry directions of the underlying ${\mathrm{CuO}}_{2}$ lattice. The positions of the elastic magnetic peaks are consistent with those …