Speaker
Prof.
Murtaza Bohra
(Mahindra Ecole Centrale, Hyderabad 500043, Telangana, India )
Description
Nanocrystalline Fe3O4 thin films were grown by adopting two different reduction approaches (1) vacuum annealing (2) wet H2 annealing. While vacuum annealed films shows Verwey transition with lower resistivity compared to the bulk Fe3O4, the same are not observed in electric transport properties of wet H2 annealed films. However, this transition was clearly seen in the temperature dependence of magnetizations of both sets of Fe3O4 thin films. This seems to indicate that the both electric transport and magnetization are independent processes; it’s just coincidence to happen at same place of Verwey transition at 120 K. Different electric transport properties in both reductions treated Fe3O4 films will be discussed.
Author
Prof.
Murtaza Bohra
(Mahindra Ecole Centrale, Hyderabad 500043, Telangana, India )
