The uniaxial anisotropy of the threshold energy for atomic displacements, the displacement cascade process and the electrical resistivity of Frenkel pairs in well-annealed pyrolytic graphite where investigated from the electrical resistivity change due to electron bombardment in the energy range 0.13 - 1.0 MeV.
The energy exchange between electrons and the lattice of a polar semiconductor is considered in the case when the decrease of the electron temperature by an electric field may occur.
Failure to observe quadratic rise of the high field magnetoresistance of single-domain crystals of Cr for those orientations for which it was to be expected on the basis of open orbits is attributed to magnetic breakdown.
It is shown that if a d.c. magnetic field imposed on a plasma is given a small low-frequency modulation, Alfvèn waves may be excited in the plasma through parametric resonance.
The production of α- and F -centers by X-rays in KC1 of different dislocation densities and impurities at 4.2°K is studied. The concentration of the vacancies generated at 4.2°K is constant.
Transverse and longitudinal phonon scattering was measured from 300°K to 80°K with special attention to the structure change around 110°K. A scattering (incident frequency) at the transition temperature suggests a phase transition of order n > 1.
An expansion for the temperature dependence of Hc2(T) in the realm T/Tc ⪡ 1 is developed from the recent theories of Werthamer et al. and of Maki and is used to analyze our data for several Zr-Nb alloys. These theories do not consistently account for the temperature dependence of Hc2(T) in these alloys for both low temperatures and for T near Tc.
The heat capacity of ferromagnetic EuS has been measured in a magnetic field at liquid helium temperatures. The experimental results compare favorably with spin wave calculations and indicate first and second neighbor exchange interactions of J1/kB = 0.20°K and of J2/kB = -0.06°K respectively.
Crystal field parameters are calculated for the compounds (Pr, Tm, Yb) X where X = N, P, As and Sb. Crystal field splittings are responsible for large Schottky anomalies of the specific heat.
Two independent experimental results obtained with exploding lithium wires indicate that the electron affinity of lithium, not having been measured hitherto, is approximately 0.6 eV.
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