Magnetization of underdoped YBa${}_2$Cu${}_3$O${}_y$ above the irreversibility field

Jing Fei Yu, B. J. Ramshaw, I. Kokanović +9

Torque magnetization measurements on YBa${}_2$Cu${}_3$O${}_y$ (YBCO) at doping $y=6.67$($p=0.12$), in DC fields ($B$) up to 33 T and temperatures down to 4.5 K, show that weak diamagne…