Diamagnetism of YBa${}_2$Cu${}_3$O${}_{6+x}$ crystals above $T_c$~: evidence for Gaussian fluctuations

I. Kokanović, D. J. Hills, M. L. Sutherland +2

The magnetization of three high-quality single crystals of YBa${}_2$Cu${}_3$O${}_{6+x}$, from slightly overdoped to heavily underdoped,has been measured using torque magnetometry. St…