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Detailed theoretical and experimental investigations of the electronic and magnetic properties of the HoCo(5-x)Si(x) Six compound (x = 0.5 and 1.0) have been performed. All theoretical investigations of the electronic and magnetic properties of the system have been done using the Korringa-Kohn-Rostoker (KKR) band structure method. The calculated magnetic moments range between 1.36 to 1.5 mu(B) per Co atom, depending on the crystal site. The calculations
Read moreThe structural, electronic and magnetic structures of MnNi(1-x)Sb(x) alloys and compounds have been investigated by X-ray diffraction, X-ray photoelectron spectroscopy, magnetization and magnetic susceptibility measurements. The substitution of Ni by Sb leads to drastic changes both in the crystallographic and electronic structure, with remarkable modifications in the magnetic properties of the investigated systems. The most important feature of
Read moreAn investigation on the electronic and magnetic properties of NiAs-type CrTe and CrSe has been performed for ferromagnetic, antiferromagnetic and non-collinear spin configurations, using the spin-polarized relativistic KKR (Korringa-Kohn-Rostoker) band structure method. Calculated exchange coupling parameters, as well as the total energy calculated as a function of the tilt angle of magnetic moments, indicate the presence of a non-collinear spin
Read moreDetailed theoretical and experimental investigations of the electronic and magnetic properties of the RCo(5-x)M(x) compounds (R=Y, Pr and M=Si, Al) have been performed. All theoretical investigations of the electronic and magnetic properties of the system have been done using the Korringa-Kohn-Rostoker (KKR) band structure method. The Si for Co substitution in RCo(5) does not change the magnetic ordering: the RCo(5-x)Si(x) with R=Y, Nd and Pr is
Read moreDetailed theoretical and experimental investigations of the electronic and magnetic properties of the Th(x)Y(1-x)Co(4)B compounds have been performed. The neutron powder diffraction shows that by Th for Y substitution, Th atoms occupy preferentially one (1a) of the two Y sites (1a and 1b). The preferential occupation on 1a and 1b crystal sites investigated by theoretical calculations is in good agreement with powder neutron diffraction results. The
Read moreDetailed theoretical investigations on the electronic and magnetic properties of the ThFe(11)C(2) compound have been performed using both the linear muffin-tin orbital and Korringa-Kohn-Rostocker methods of band structure calculation. The structure of the ThFe(11)C(2) compound has three inequivalent iron sites with different local environment. A strongly enhanced magnetic moment is observed on certain Fe positions, coexisting with much lower magnetic
Read moreThe relationship between medicine and natural sciences was closer in earlier times of the history of medicine in Transylvania than today: at the end of the 18th century, physicians and surgeons of the Comitats (the regional administrative divisions) collected minerals and plants for the museums of natural sciences and for the high school biology labs. In 1763, physicians were obliged to study and describe the mineral waters of each Comitat.100 years
Read moreMaize (Zea mays) has a large class of seed mutants with opaque or nonvitreous endosperms that could improve the nutritional quality of our food supply. The phenotype of some of them appears to be linked to the improper formation of protein bodies (PBs) where zein storage proteins are deposited. Although a number of genes affecting endosperm vitreousness have been isolated, it has been difficult to clone opaque7 (o7), mainly because of its low penetrance
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