Magnetization and critical state models in YNi<inf>2</inf>B<inf>2</inf>C

Magnetization measurements have been performed on superconducting YNi2B2C at different temperatures below Tc with maximum applied fields ranging from 200 Oe to 15 kOe. The experimental data were analyzed using Kim and exponential field dependent critical state models. It is found that Kim model provides a better estimation of Jc.