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I n ‐ s i t u x‐ray data has been obtained on 99.99% pure cerium at 50 and 52 kbar with the use of a Bragg‐Brentano parafocusing x‐ray reflection technique under quasihydrostatic conditions, with a thermal cycling procedure. Our results, based upon 22 experimental diffraction lines,...
In a previous paper it was shown that the precession of the spins in a ferromagnetic domain produces an ’’extra’’ force on the domain. In this communication it is shown that this extra force may be treated as arising from a change in momentum.
Plane solid targets (D 2 , C, and Cu) were irradiated with Nd laser pulses of 5‐ns duration with energies of up to 50 J giving peak intensities up to 10 15 W/cm 2 in the focal spot. The x‐ray emission of the plasma has been studied by using scintillators together with photomultipliers,...
Angular and energy distributions of 30‐keV energy argon ions scattered by (100) face of copper crystal were experimentally studied. It was found that the half‐widths of the angular distributions vs azimuthal angle of target rotation exhibit dips at aligned orientations of the target relative...
A simple analytic theory for the operation of rf SQUID’s in the regime where the current I in the superconducting ring is a continuous function of the applied flux (nonhysteretic mode) has been extended to include the effects of screening flux L I , where L is the inductance of the ring. A...
The Griffith equation was originally derived for relatively sharp cracks. The equation can also be applied to round cracks provided a characteristic fracture surface energy value associated with the particular crack‐tip radius is used.
The diffusion of Pt into Si from a silica film at temperatures between 800 and 1000 °C has been found to provide room‐temperature minority‐carrier lifetimes between 10 nsec and 1 μsec. Evaluation of the dependence of lifetime on ambient temperature and on majority‐carrier doping...
A Ba 2 Ge 2 TiO 8 crystal is found to exhibit ferroelastic behavior. Optical, thermal, and elastic studies indicate that the phase transition occurs at about 810 °C. The wedge‐shaped twin domains disappear above the phase transition temperature. The twinned crystal is detwinned by an exchange...
The coercive force of a sintered SmCo 5 permanent magnet is found to depend reproducibly on the temperature of heat treatment. In order to find out the origin of this, the mechanism of the demagnetization was studied by magnetic‐domain observation, using the polar Kerr effect. It appears that...
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