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Neutron diffraction measurements on flux line single crystals in different type II materials are reported. It is shown that the type, the perfection, and the orientation of the vortex lattice with respect to the metal crystal mainly depend on the symmetry of the crystal axis which is parallel to...
The electron quantum interference phenomenon was used to determine the effects of substitutional alloying upon the quantum-state lifetime τ and band gapsE
at the Fermi energy in single crystals of pure Mg. Vapor-grown alloys containing either Zn or Cd in concentrationsC∼0.3–15 ppm were...
Thin Nb3Sn films on bendable quartz substrates have been prepared by different methods. These films exhibit an initial tensile stress. Bending the samples by two methods under known conditions results in quantitative changes of tensile stress and in relative changes of the superconducting...
We describe a calculation of the stress dependence of the superconducting transition temperature of non-transition metals using the McMillan equation. We include effects due to the stress dependence of the pseudopotential and the electronic band structure density of states, and we show that the...
A recent dirty-limit version of the Gor'kov theory is used to calculate numerically the self-consistent structure and free energy of isolated vortices and of the vortex lattice in the circular cell approximation at arbitrary temperature and Ginzburg-Landau parameter κ. This yields the lower...
The virtual crystal approximation is used to formulate the Schrödinger equation for the electronic band structure of a dilute substitutional alloy and to analyze the effect of coherent scattering on the lifetime τ
of an electron quantum state. Both coherent and incoherent scattering theory...
Measurements of the high-field magnetoresistance in AuGa indicate the existence of open orbits in . The nearly free-electron model predicts open orbits in  and , but evidence for the existence of the latter only begins to appear at the highest fields used in this work.
Resistance and magnetoresistance measurements are presented for specimens of Li(NH3)4 with mole ratios of 4:1, NH3:Li. Measurements were made using a probeless, mutual inductance technique from 1.5 to 4.2 K and from 10 to 100 K. The low-temperature resistivity has a largely quadratic temperature...
Cerous magnesium nitrate (CMN) is the preeminent electronic paramagnet in use in cryogenic physics for magnetic thermometry and adiabatic cooling. In demagnetization experiments designed to establish the thermodynamic temperature relations for CMN, an inexplicable heat capacity anomaly was found...
The ultrasonic attenuation of the excitonic state in pure Bi in high magnetic fields is studied theoretically. Use is made of the mean-field approximation to describe the excitonic state in pure Bi in the extreme quantum limit, where the motion of the electron and the hole is limited only in the...
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