Anomalous peak effect in and Fracturing of a flux line lattice

S. Banerjee, N. Patil, S. Saha, S. Ramakrishnan, A. Grover, S. Bhattacharya, G. Ravikumar, P. Mishra, T. Chandrasekhar Rao, V. Sahni, M. Higgins, E. Yamamoto, Y. Haga, M. Hedo, Y. Inada, Y. Onuki