https://dspace.library.iitb.ac.in/jspui/handle/100/196 2026-04-14T21:12:29Z https://dspace.library.iitb.ac.in/jspui/handle/100/36463 Mission-oriented higher education institution: some concerns BANERJEE, R 2020-01-01T00:00:00Z https://dspace.library.iitb.ac.in/jspui/handle/100/36464 Authors' Reply To: (CI 20-0229) Comments on Design of controllers with arbitrary convergence time [Automatica 108710] PAL, AK; KAMAL, S; NAGAR, SK; BYOPADHYAY, B; FRIDMAN, L 2020-01-01T00:00:00Z https://dspace.library.iitb.ac.in/jspui/handle/100/36341 Pressure induced martensitic transition, magnetocaloric and magneto-transport properties in Mn-Ni-Sn Heusler alloy SHARMA, J; COELHO, AA; REPAKA, DVM; RAMANUJAN, RV; SURESH, KG In this work, we report the effect of hydrostatic pressure (P) on the martensitic transition in Mn50Ni40Sn10 Heusler alloy using the magnetization and electrical resistivity measurements. Martensitic transition temperature (T-M) is found to shift significantly to higher temperatures with the application of pressure, which reflects the stabilization of the martensite phase. On the other hand, T-M shifts to lower temperatures with magnetic field, which implies the stabilization of the austenite phase. The estimated rate of change of martensitic transition temperature with pressure (dT(M)/dP) for the present alloy is similar to 4.6 K/kbar. The alloy shows a maximum negative magnetoresistance (MR) of 9.6% for P = 4 kbar at the martensitic transition. A large isothermal magnetic entropy change (Delta S-M) of 16.6 J/kg.K and a refrigerant capacity (RC) of similar to 146 J/kg are observed at TM under ambient pressure. Both quantities are found to decrease with the increase of pressure. The values of Delta S-M and adiabatic temperature change (Delta T-ad), calculated from heat capacity measurements are similar to 11.3 J/kg. K and -3.4 K respectively for 50 kOe field change. The observed pressure and field dependence results have been explained using the Clausius-Clapeyron equation. The combined effect of pressure and field on the martensitic transition is also discussed. 2019-01-01T00:00:00Z https://dspace.library.iitb.ac.in/jspui/handle/100/29574 Pressure induced martensitic transition, magnetocaloric and magneto-transport properties in Mn-Ni-Sn Heusler alloy SHARMA, J; COELHO, AA; REPAKA, DVM; RAMANUJAN, RV; SURESH, KG In this work, we report the effect of hydrostatic pressure (P) on the martensitic transition in Mn50Ni40Sn10 Heusler alloy using the magnetization and electrical resistivity measurements. Martensitic transition temperature (T-M) is found to shift significantly to higher temperatures with the application of pressure, which reflects the stabilization of the martensite phase. On the other hand, T-M shifts to lower temperatures with magnetic field, which implies the stabilization of the austenite phase. The estimated rate of change of martensitic transition temperature with pressure (dT(M)/dP) for the present alloy is similar to 4.6 K/kbar. The alloy shows a maximum negative magnetoresistance (MR) of 9.6% for P = 4 kbar at the martensitic transition. A large isothermal magnetic entropy change (Delta S-M) of 16.6 J/kg.K and a refrigerant capacity (RC) of similar to 146 J/kg are observed at TM under ambient pressure. Both quantities are found to decrease with the increase of pressure. The values of Delta S-M and adiabatic temperature change (Delta T-ad), calculated from heat capacity measurements are similar to 11.3 J/kg. K and -3.4 K respectively for 50 kOe field change. The observed pressure and field dependence results have been explained using the Clausius-Clapeyron equation. The combined effect of pressure and field on the martensitic transition is also discussed. 2019-01-01T00:00:00Z