Deligiannis, K., de Groot, P.AJ., Oussena, M., Pinfold, S., Langan, R., Gagnon, R. and Taillefer, L.
New features in the vortex phase diagram of YBa2Cu3O7- delta.
Physical Review Letters, 79, (11), . (doi:10.1103/PhysRevLett.79.2121).
Magnetic and transport measurements have been performed in high quality YBa2Cu3O7- delta single crystals. We demonstrate for the first time that the magnetization peak line in the phase diagram of YBa2Cu3O7- delta , Hp(T) exhibits an impressive similarity with the equivalent line for Bi2Sr2CaCu2O8. Our results show not only a similar temperature dependence but also an almost identical response to oxygen doping and a correlation to the multicritical point. At high temperatures we observe a previously unreported splitting of the magnetization peak.
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