We have analyzed the electronic structure of half-metallic magnets based on first principles electronic structure calculations of a series of semi-Heusler alloys. The characteristic feature of the electronic structure of semi-Heusler systems is a d-d gap in the density of states lying at/close to the Fermi level depending on the number of valence electrons. We have employed various indicators o...

Strongly correlated systems with the interplay of electronic, charge, spin, and orbital degrees freedom have, in recent times, received a surge interest because their rich physics, novel physical properties, potential applications. In present work, we study structural, magnetic, electronic properties ordering layered perovskite-type $A\mathrm{Mn}{\mathrm{F}}_{4} (A=\mathrm{K},\mathrm{Rb})$ from...

We discuss the phase stability of the important element Fe in terms of the contributions to stability from the various forms of magnetism that exist in Fe. We point out that the ferromagnetic Fe is not cubic and that it is reasonable to return the beta phase of Fe to the phase diagrams based on Fe to designate paramagnetic BCC form of iron. We give a working definition of a phase, which include...

There are errors in the Funding section. The correct funding information is as follows: This work was supported by National Natural Science Foundation of China (NNSFC31400091) (http://www.nsfc.gov.cn), Natural Science Foundation of Jiangsu Province (BK2012202) (http://www.jstd.gov.cn/), Chinese Postdoctoral Science Foundation (2013M540518) (http://res.chinapostdoctor.org.cn/BshWeb/index.shtml),...

This study investigated a simple model of transformers that have liquid magnetic cores with different concentrations of ferro-nanofluids. The simple model was built on a capillary by enamel-insulated wires and with ferro-nanofluid loaded in the capillary. The ferro-nanofluid was fabricated by a chemical co-precipitation method. The performances of the transformers with either air core or ferro-...

This essay investigates the magnetoviscous properties of ferro uid ow in both an external magnetic eld and in zero eld. Zeroeld properties of ferro uids are examined. Phenomena such as the dramatic increase in ferro uid viscosity in the presensce of a static eld as well as negative viscosity for an alternating magnetic eld are described.

The Blume Emery Griffiths model is investigated by use of the cluster variation method in the pair approximation. We determine the regions of the phase space where reentrant phenomenon takes place. Two regions are found, depending on the sign of the reduced quadrupole quadrupole coupling strength ξ. For negative ξ we find Para-Ferro-Para and Ferro-Para-Ferro-Para transition sequences; for posit...

How magnetism affects the Seebeck effect is an important issue widely concerned in thermoelectric community yet remaining elusive. Based on a thermodynamic analysis of spin degrees freedom varied $d$-electron based ferro- and anti-ferromagnets, we demonstrate that itinerant or partially magnetic compounds there exists generic contribution to over extended temperature range from slightly below w...

A anemia é um problema muito comum entre as crianças brasileiras1. Assim, não surpreende que a incidência de deficiência de ferro e anemia por deficiência de ferro seja consideravelmente elevada em lactentes nascidos em um hospital no estado do Rio Grande do Sul entre os 12 e os 16 meses de idade. Dos 369 lactentes que tiveram seus níveis de hemoglobina sérica mensurados no relato de Bortolini ...

O ácido fólico tem sido identificado como uma das mais importantes vitaminas para a função normal do metabolismo humano. A deficiência de ferro é um sério problema de saúde que afeta uma grande proporção da população do mundo. No Brasil, foi publicada uma regulamentação indicando que farinhas de milho e trigo devem ser fortificadas com ácido fólico e ferro. O objetivo deste trabalho foi avaliar...