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2 Acta Physica Polonica A

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Electronic and Magnetic Properties of Y(FeV)_{12} Compound and its Carbides

100%

Deniszczyk J. , Borgieł W.

nr 2

459-462

Electronic and magnetic properties of body centered tetragonal YFe_{8}V_{4} carbon doped compounds were determined by tight-binding linear muffin-tin orbitals method assuming experimental values of lattice constants. Total, partial densities of states and magnetic moments for YFe_{8}V_{4} and its carbides for different positions of carbon within unit cell of parent compound were calculated and discussed. In spite of carbides' unit volume decrease enhancement of magnetization and Curie temperature were obtained. Results are in quantitative agreement with experimental data.

Anomalous Reversible Torque in Layered Superconducting Bi_{2}Sr_{2}CaCu_{2}O_{x} Single Crystal

80%

Drzazga Z. , Borgieł W. , Szymczak R. , Szymczak H.

Acta Physica Polonica A

1996

tom 89

nr 1

91-98

Magnetic anisotropy of layered superconducting Bi_{2}Sr_{2}CaCu_{2}O_{x} single crystal was investigated by the torque method in the reversible regime. The torque was analyzed in the model taking into account 2D layered structure. Considered model gives the better fit to the data when the magnetic field is applied near (a, b) plane. Obtained results establish to 6×10_{3} value of the superconducting effective mass anisotropy coefficient ε.