Comment on "Magnetic Field Independence of the Spin Gap in YBa_2Cu_3O_{7-d}" by K. Gorny et al., Phys. Rev. Lett. 82, 177 (1999)

V. F. Mitrovi{ć}, H. N. Bachman, W. P. Halperin +2

In a recent Letter of Gorny et al. it was reported that the spin-lattice relaxation rate in YBCO_{7-d} is magnetic field independent. These authors point out that their results are…