Sampad Mondal

Publications

1. PRB

   Role of f − d exchange interaction and Kondo scattering in the Nd-doped pyrochlore iridate ( Eu 1 − x Nd x ) 2 Ir 2 O 7

   Mondal, Sampad, Modak, M., Maji, B., Ray, Mayukh K., Mandal, S., Mandal, Swapan K., Sardar, M., and Banerjee, S.
2. Magnetocaloric as a sensitive tool to study magnetic phase in Ca 4 Mn 3 O 10 - δ

   Mondal, Sampad, Modak, Mantu, Ray, Mayukh,  Mandal, Swapan, Sardar, Mahdi, and Banerjee, Sangam

   Abs

   We report here magnetic properties of non-stoichiometric . We have measured magnetisation, electrical resistance, magnetoresistance, specific heat and thermo remanent magnetization (TRM) relaxation measurements. We find that at temperatures above 75 K the electrical transport can be explained in terms of activated hopping of magnetic polarons. These polarons are formed due to oxygen vacancy inducing sites. Below 50K the polarons begins to strongly localize causing loss of moment and the electrical transport is governed by variable range hopping (VRH) conduction. The system shows glassy spin relaxation below 50K, which presumably evolves into cluster spin glass at 12 K due to short range ordering of the canted moments. All these aspect could be well correlated with characteristics signature from magnetocaloric effect indicating magnetocaloric is a sensitive tool to study magnetic phase.

3. PRB

   Evolution of magnetic and transport properties in the Cu-doped pyrochlore iridate Eu 2 ( Ir 1 − x Cu x ) 2 O 7

   Mondal, Sampad, Modak, Mantu, Maji, Bibekananda,  Mandal, Swapan, Ghosh, B., Saha, Surajit, Sardar, Mahdi, and Banerjee, Sangam