Absence of magnetic field effect on static magnetic order in electron-doped superconductor Nd₁.₈₆Ce₀.₁₄CuO₄

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Neutron-scattering experiments were performed to study the magnetic field effect on the electron-doped cuprate superconductor Nd₁.₈₆Ce₀.₁₄CuO₄, which shows the coexistence of magnetic order and superconductivity. The (1/2 3/2 0) magnetic Bragg intensity, which mainly originates from the order of both the Cu and Nd moments at low temperatures, shows no magnetic field dependence when the field is applied perpendicular to the CuO₂ plane up to 10 T above the upper critical field. This result is significantly different from that reported for the hole-doped cuprate superconductors, in which the quasi-static magnetic order is noticeably enhanced under a magnetic field.