Vortex dynamics in (Tl,Pb)(Sr,Ba)2Ca2Cu3Oy single crystal

Abstract Magnetic moment measurements performed on a single crystal sample of (Tl,Pb)(Sr,Ba) 2 Ca 2 Cu 3 O y reveal an increase in magnetic moment at intermediate fields. Magnetic hysteresis ( m – H ) loops were taken at different constant temperatures using either a MPMS-5T SQUID magnetometer or a PPMS-9T magnetometer and within the temperature range 0.1  T / T c