Thermoelectric and Photovoltaic Properties of Mn-Doped Kesterite CuZnMnSnSe.

The semiconductor CuZnSnSe (CZTSe) is a promising candidate for both thermoelectric and photovoltaic energy harvesting applications due to a combination of features such as direct band gap, high absorption coefficient, and low thermal conductivity. We report the solid-state synthesis and characterization of Mn-doped CuZnMnSnSe ( = 0, 0.05, 0.

Weak ferromagnetism and time-stable remanence in hematite: effect of shape, size and morphology.

A number of Dzyaloshinskii-Moriya interaction (DMI) driven canted antiferromagnets or weak ferromagnets (WFM) including hematite exhibit two distinct time scales in magnetization relaxation measurements, one of which is ultra-slow. This leads to the observation of a part of remanence that is time-stable in character. In this work, our endeavor is to optimize the magnitude of this time-stable remanence for the hematite, a room temperature WFM, as a function of shape size and morphology.