Bappaditya Pal

5 Questions 8 Answers 0 Followers

Questions related from Bappaditya Pal

What is the microscopic origin of d(0) ferromagnetism and its type of exchange interaction in case of metal oxide(ZnO, TiO2) nanostructured materials?

There are many reports on defect related ferromagnetism in Oxide materials. Also its saturation moment is quite low and it varies a lot depending on the growth process. So is it possible to use it...

05 February 2015 6,519 4 View

What does the "Anomalous Hall Effect" measurement can provide and how can it give idea about the "spin polarization" of carriers?

Kindly tell me in detail about the possible outcomes of the "Anomalous Hall Effect" measurement.

07 August 2014 1,189 5 View

What is Magnetic Polaron, it's role in ferromagnetic interactions and in what kind of magnetic materials?

As far my understanding tells, a BMP is a particular type of molecule-complex in an occupied donor or an acceptor. Bound electrons (holes) trapped by the defect states can couple with the...

14 June 2014 7,165 1 View

How can we measure and show the presence of spin polarized carriers in the magnetic semiconducting materials?

In general if we can produce a good quality magnetic semiconducting material (Like Nanorods, Nanoparticles or a Thin film) by doping TM(Mn, Co, Ni) in a semiconducting host(ZnO, TiO2, GaN) system...

27 May 2014 4,444 7 View

Can we consider the absorption-edge of UV-VIS absorption spectra as band gap energy in case of nanoparticles or nanostructures?

Generally we can calculate band gap from UV-Vis spectroscopy using Tauc Plots. (ahv)1/2 Vs hv. a (alpha), absorbance. But for nanostructures it can be around the same energy value as obtained from...

10 May 2014 3,144 8 View