Electronic, magnetic, vibrational, and X-ray spectroscopy of inverse full-Heusler FeIrSi alloy.

We report the electronic, magnetic, structural, vibrational, and X-ray absorption spectroscopy of the inverse full-Heusler Fe2IrSi alloy. We employed state-of-the-art first-principles computational techniques. Our ab initio calculations revealed a ferromagnetic half-metallicity with a magnetic moment of ∼5.

Pressure dependent half-metallic ferromagnetism in inverse Heusler alloy FeCoAl: a DFT+U calculations.

We report the electronic and magnetic properties along with the Curie temperature ( ) of the inverse full Heusler alloy (HA) FeCoAl obtained by using the first-principles computational method. Our calculations suggests that FeCoAl is a magnetic metal when treated within PBE-GGA under the applied compressive pressures. However, the implementation of electron-electron (U) (, GGA+U) with varying compressive pressure () drastically changes the profile of the electronic structure.

Application of Magnetic Force Microscopy for Investigation of Epitaxial Ferro- and Antiferromagnetic Structures.

Growing of epitaxial FeMn/Fe/Mo/R-sapphire films was performed with a new configuration of two in-plane easy axes of Fe(001)-layer magnetization in which application of annealing in a magnetic field forms an unidirectional anisotropy. The microstructures made from these films exhibited an exchange bias 25-35 G along an exchange field generated at antiferromagnet/ferromagnet (AFM/FM) interface. Magnetic force microscopy (MFM) experiments supported by micromagnetic calculations and magneto-resistive measurements allowed interpretation of the magnetic states of the Fe layer in these microstructures.

[Development of arrhythmia in patients after heart surgery in relation to the length of the Q-T interval].

To predict intra- and postoperative ventricular arrhythmias, the length of Q-T interval was determined in 29 patients after cardiosurgical interventions made under artificial circulation by using ECG monitoring. The occurrence of ventricular arrhythmias were found to be related to a Q-T interval index of more than 20% of the normal value. The application of simple computer systems allows the Q-T interval to be monitored on line, identifying patients at a high risk for arrhythmias and using an adequate antiarrhythmic therapy.