Search results

To determine the electrical, structural, optical and transport properties calculated using WIEN2k code.

By employing the WIEN2k code, we have theoretically examined the physical properties of the full-Heusler Te₂AcGa alloy. The FP-LAPW technique is utilized for theoretical calculations.

An indirect bandgap of 0.42 eV is seen with the GGA potential. An enhancement in bandgap with a value of 0.97 eV is observed with mBJ potential. The density of states is determined to verify the band structure profile. The dynamical and structural stability is attained through the computations. The electron density contour plot is utilized to explore the bonding nature of the compound. Optical properties have been calculated with respective potentials showing significant absorption in the visible region. Furthermore, thermoelectric properties have been evaluated to confirm the potential of Te₂AcGa for thermoelectric devices. At elevated temperatures, the ZT with mBJ potential obtained a large value of 0.8.

High absorption and ZT values make the Te_2AcGa alloy have potential for optoelectronic and renewable energy devices.

In the submitted manuscript, first principle calculations are carried out for the first time to study the structural, dynamic, electronic, optical and thermoelectric properties of the full-Heusler Te₂AcGa alloy. Modified Becke–Johnson (mBJ) exchange-correlation potential provides very accurate results. The bandgap profiles and related properties are calculated in the present work. The entire work gives useful results of fundamental importance, which can be utilized for the fabrication of optoelectronic and thermoelectric applications.

The presentation refers to simulations of magnetization processes of the spring-exchange magnetic composites containing magnetically soft and ultra-high coercive phases. In particular, the aim of this study is to investigate the possibility of reducing expensive rare earth (RE) in the so-called neodymium magnets and improving their efficiency.

In order to model hysteresis loops, a special disorder-based Monte Carlo procedure, suitable for irregular geometry of the composites, was applied. The chosen system parameters were defined in order to model Nd2Fe14B/Fe composites.

The results suggest potential for optimizing hard magnetic composites. Magnetization curve parameters are sensitive to grain coupling and easy magnetization axis ordering. Strong coupling for a single-phase hysteresis loop is unachievable for grains above a certain size, i.e. found to be a few hundred nanometers. Considering these factors and their interdependencies, it’s possible to enhance the |BH|max parameter or reduce the RE content.

The research was carried out using computer simulations, which by their nature are only approximations of physical processes. The next stage of research is to produce the described composites and test their actual properties.

The research enhances permanent magnets, boosting efficiency in technologies like wind turbines and electric motors, indirectly benefiting the environment. It also reduces RE elements in magnets for environmental, economic and political gains.

The unique approach is to consider the random orientation of the magnetic anisotropy of the hard magnetic grains, which is close to real powder composites. The results provide valuable guidance for the production process of permanent magnets.

This article aims to assess risks related to the supply chain 5.0 digitalization. It aims to analyze interdependencies and causal relationships between critical digital supply chain 5.0 risks, emphasizing the need for proactive management to address emerging challenges.

Through an extensive literature review and expert judgment, risks related to supply chain 5.0 digitalization are identified. An integrated approach for risk assessment is employed, where the Analytic Hierarchy Process (AHP) is utilized to prioritize these risks. Subsequently, the Decision-Making Trial and Evaluation Laboratory (DEMATEL) method is employed to investigate cause-and-effect relationships among the identified top 10 risks. This comprehensive analysis forms the basis for informed strategic management decision-making.

The analysis identifies significant influences of “Dependence on technology,” “Complexity”, “Potential system failures”, and “Cyber security” while “Environmental impact” and “Socio-economic disparities” emerge as prominent risks in supply chain 5.0 digitalization. These findings offer actionable insights for management decision-making, guiding the formulation of strategies to address and mitigate critical risks.

The proposed integrated approach (AHP-DEMATEL) provides valuable insights for managers to effectively mitigate digital supply chain 5.0 risks and strategically respond to disruptions. By prioritizing risks, organizations can allocate resources efficiently and address the most critical challenges first, minimizing long-term damage to resilience. Embracing this approach enables practitioners to enhance overall supply chain resilience, guiding key management decisions for the development of sustainable and adaptive strategies.

This paper marks the first comprehensive attempt to assess supply chain 5.0 digitalization risks using decision-making methods like AHP and DEMATEL. The integrated approach contributes novel insights to the field of supply chain risk management, specifically aiding management decision-making in the face of digitalization challenges.