Tranquada, J. M.Lee, C. H.Yamada, K.Lee, Y. S.Regnault, L. P.Ronnow, H. M.2007-01-242007-01-242007-01-24200410.1103/PhysRevB.69.174507https://infoscience.epfl.ch/handle/20.500.14299/239939We study the effect of a magnetic field (applied along the c axis) on the low-energy, incommensurate magnetic fluctuations in superconducting La1.82Sr0.18CuO4. The incommensurate peaks at 9 meV, which in zero field were previously shown to sharpen in q on cooling below T-c [T. E. Mason , Phys. Rev. Lett. 77, 1604 (1996)], are found to broaden in q when a field of 10 T is applied. The applied field also causes scattered intensity to shift into the spin gap. We point out that the response at 9 meV, though occurring at incommensurate wave vectors, is comparable to the commensurate magnetic resonance observed at higher energies in other cuprate superconductors.HIGH-TEMPERATURE SUPERCONDUCTORSINELASTIC NEUTRON-SCATTERINGT-CCUPRATE SUPERCONDUCTORSSPIN DYNAMICSGAPBI2SR2CACU2O8+DELTAYBA2CU3O6.6COHERENCESTATEtext::journal::journal article::research article