8/14/2023 0 Comments Si lattice constantWhen the semiconductor is exposed to light, it absorbs the light’s energy and transfers it to negatively charged particles in the material called electrons. There are several different semiconductor materials used in PV cells. The PV cell is composed of semiconductor material the “semi” means that it can conduct electricity better than an insulator but not as well as a good conductor like a metal. The contribution of the magnetic transition, near the Curie temperature, should also be considered in the short range order (SRO).When light shines on a photovoltaic (PV) cell – also called a solar cell – that light may be reflected, absorbed, or pass right through the cell. Parizek and Cizek studied the NiCo (21at%Co) alloy above the Curie temperature and observed a lower electrical resistivity in the deformed state than in the annealed state, possibly due to the modified electronic structure. Bozorth using magnetic permeability and electrical resistivity with this alloy composition has not been able to detect these anomalies. indication some ordering degree in the NiCo alloy. According to Collins and Wheeler, there are small anomalies in the magnetization saturation and thermal e.m.f. Because of the similarity of the scattering factors of Ni and more » Co, the X-ray technique could not confirm the existence of the superstructure. These results should indicate the existence of a critical temperature of ordering, Tc, in the range 750-800 C. These parameters became even smaller once the NiCo alloy was annealed for a long time at 750 C and quickly cooled to room temperature. Fine filings of the same alloy quenched from 900 C showed higher lattice parameters than slowly cooled samples. Lattice parameter and atomic volume measurements against Co content in NiCo alloy, annealed at 900 C and slowly cooled to room temperature, showed a pronounced inflection near 33.1% Co. The Debye temperature of the alloy at 0/sup 0/K is 501.1/sup 0/K. Calculated values for the isothermal Young's modulus (E), the shear modulus (G), and the Poisson ratio (.nu.) of a polycrystalline aggregate of Fe/sub 3/Si possessing a random distribution of crystallite orientations are, for T=295/sup 0/K, as follows: E = 2.15 x 10/sup 11/ N/m/sup 2/, G = 0.828 x 10/sup 11/ N/m/sup 2/, and. We infer from this that, had the composition been exactly stoichiometric, which it was not, and the crystal, free of internal voids generated during growth from the melt, the rho/sub o/ would have approached zero: a behavior that has not been reported previously for a (non-superconducting) long-range ordered alloy. The residual resistivity (rho/sub o/) was determined to be 0.6. The electrical resistivity and elastic constants of slowly cooled single-crystal specimens of the ordered alloy Fe/sub 3/Si (cubic, DO/sub 3/ structure) were measured from 4.2/sup 0/K to room temperature. The concentration dependence of T/sub m/ and of the coefficients A and B is discussed in relation with the magnetic and structural properties of the amorphous Fe-P-B alloys. The temperature dependence of rho is expressed by a phenomenological law: rho(T) = rho/sub 0/ + A log T + B T/sup 2/ + CT. A minimum in the variation of rho as a function of the temperature T occurs at T/sub m/. and T/sub c/ when P (or B) substitutes for Fe at c/sub B/ (or c/sub P/) constant is explained by a comparison between the amorphous Fe and the fcc Fe. and T/sub c/ when B substitutes for P at c/sub Fe/ constant suggests the existence of two different short-range orders in the amorphous alloys, corresponding to the epsilon and epsilon/sub 1/ crystal structures in the Fe/sub 3/P/sub 1-x/B/sub x/ compounds. (4.2/sup 0/K), Curie temperature, T/sub c/, more » and electrical resistivity, rho, measurements from 4.2/sup 0/K up to the amorphous-crystal transformation. Concentration dependence of the electronic and magnetic properties was systematically studied in alloys within the whole amorphous diagram by means of bulk magnetization, anti. For a fixed Fe concentration, B substitutes for P over a large scale, the maximum substitution occurring for c/sub Fe/ = 80 at. Alloys were found to be amorphous within the Fe concentration range 75 less than or equal to c/sub Fe/ less than or equal to 83 at. The ternary diagram of the amorphous phase in the splat-cooled Fe-P-B system was investigated by x-ray diffraction measurements.
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