On the field induced reentrant transition in Nd_0.5Sr_0.5MnO₃

Abstract

We probe a field induced reentrant transition in Nd_0.5Sr_0.5MnO₃ through resistivity and magnetization measurements. This transition is observed while warming, provided the measurement field is lower compared to the cooling field. Moreover, for the same measurement field, this reentrant transition shifts to a lower temperature for larger cooling fields. Since this transition occurs well below the closure of thermal hysteresis involving two long-range ordered states through the first order transition, it has a special significance related to the low temperature state of Nd_0.5Sr_0.5MnO₃. These observations not only bring out hitherto unexplored novel features but also indicate that the low temperature state of Nd_0.5Sr_0.5MnO₃ is not in thermal equilibrium and reinforce the earlier assertion that there is a glass-like arrested phase in this system.