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Effect of Forming Pressure on the Critical Temperature in YBa2Cu3O7−δ Superconductors
The effect of pressure on the critical temperature Tc is studied for YBa2Cu3O7–δ compounds prepared under various forming pressures. A systematic decrease in lattice parameters is observed with
Magnon Localization in One-Dimensional Disordered XYZ Heisenberg Ferromagnets
Disordered one-dimensional XYZ Heisenberg ferromagnets with substitutional impurities are studied. The substitutional spins give rise to a random distribution of the exchange couplings. By
Simple geometry of solar concentrators
Presentation de methodes de construction de differents types de concentrateurs solaires composes de sections planes
Low Temperature Specific Heats of AgSb Alloys
Low temperature specific heats of AgSb alloys of concentrations 0.89; 2.67; 3.7, and 4.72 at% are measured between 0.4 and 4.2 K. Experimental results for pure Ag and AgSb alloys obey the relation