Experimental and computational study on the influence of cobalt substitution on the structural, impedance, electronic, magnetic, and optical properties of pseudobrookite-structured FeTiO.

We report on how Co substitution of the Fe sites of pseudobrookite (FeTiO) influences the crystal structure, high-temperature electric permittivity, impedance, electronic structure, magnetic, and optical properties experimental and theoretical investigations. The pseudobrookite phase contains two types of octahedral sites, Fe atoms reside on type of the sites while Ti on the others and replacing Fe with Co can have a huge influence on one or more physical properties that can render the material more useful for solar energy applications. X-ray diffraction and high-temperature electric permittivity/impedance were the experimental tools used.

Does more stringencies in government policies during pandemic impact stock returns? Fresh evidence from GREF countries, a new emerging green bloc.

In this paper, we investigate the impact of the government economic policies in addition to the more stringent Covid-19 policies on stock index returns of GREF countries, that is, a new economic bloc of 5 countries (Pakistan, Iran, Turkey, Russia, and China) to foster for sustainable development of the region. Using the Panel, ARDL model and data for index returns and economic and Covid-19 control policies for the period March 1, 2020-June 30, 2021, results show that Income support, workplace closure, stringency index, and cancellation of public events have a significant positive impact on the stock index returns over the long run. In contrast, school closure, restriction on public gatherings, and international travel control policies negatively impact stock returns.

On the structure-property relationships of (Al, Ga, In)-doped spinel cobalt ferrite compounds: a combined experimental and DFT study.

We report a combined experimental and theoretical study of pure and doped cobalt ferrite where 25% of Fe ions were replaced by Al, Ga, and In ions, respectively, i.e., CoFeXO (X = Al, Ga, and In).

Structure-property correlations, defect driven magnetism and anomalous temperature dependence of magnetic coercivity in PbTiFeO (0 ≤x≤ 0.5) systems.

The search for new multiferroic materials is on the rise due to their potential applications in an advanced generation of highly efficient multifunctional devices. Here we report a series of PbTiFeO (0 ≤x≤ 0.5) samples prepared by a solid-state reaction method.

Effect of substrate orientation on local magnetoelectric coupling in bi-layered multiferroic thin films.

In this study we explore the prospect of strain-mediated magnetoelectric coupling in CoFe2O4-BaTiO3 bi-layers as a function of different interfacial boundary conditions. Pulsed laser deposition fabricated thin films on Nb:SrTiO3(100) and Nb:SrTiO3(111) single crystal substrates were characterized in terms of their peculiarities related to the structure-property relationship. Despite the homogeneous phase formation in both films, transmission electron microscopy showed that the bi-layers on Nb:SrTiO3(100) exhibit a higher number of crystallographic defects when compared to the films on Nb:SrTiO3(111).

A new (Ba, Ca) (Ti, Zr)O3 based multiferroic composite with large magnetoelectric effect.

The lead-free ferroelectric 0.5Ba(Zr0.2Ti0.