Observation of square flux-line lattice in the unconventional superconductor Sr(sub2)RuO(sub4)

Superconductivity is of considerable scientific and practice interest and to gain further information about the properties of the superconductor, the intensity of the flux-line lattice (Fll) signal must be understood, or the magnitude of the Fourier components. A small-angle neutron-scattering measurement of magnetic flux lines in the Sr(sub2)RuO(sub4) perovskite superconductor was taken. Magnetic flux lines were found to form a square lattice over broad field and temperature fields.