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This paper describes a simple technique for determining the coefficient of kinetic friction for extremely small displacements. An attempt was made to obtain more information about the transition stage between the coefficients of static and kinetic friction. If the force of static friction...
A low‐pressure magnetically confined argon arc discharge was used in a mass spectrometer ion source to study low‐energy (0–100 eV) sputtering of polycrystalline copper. Target bombarding ion current densities ranged from 60–200 μA∕cm 2 . Neutral particles were studied. Cu atoms and Cu...
A spectrophotometric method for determining the concentration of chromium in oriented and unoriented single ruby crystals is described. It makes use of the absorption coefficients for the blue and green bands and for the red lines at ∼300°K. The coefficients are based on concentration data...
The effect of modulation amplitude on magnetic resonance linewidths δ H (between slope extrema) and derivative signal intensity is examined. Experimental results are compared with theory for Lorentzian and Gaussian lines. Modulation amplitudes, h m , of 0.15δ H or 2 h m (peak to peak) = 0.30δ...
The refractive index of GaAs, as measured by the prism refraction method, is reported here for photon energies from 0.7 eV up to the absorption limit set by the band gap, for temperatures of 300°, 187°, and 103°K. The results are compared with the previous data (obtained only for room...
Diffusion of chromium in pure nickel has been studied by radioactive tracer and residual activity technique. The diffusion coefficient (in units of cm 2 ∕sec) in the range 600°−900°C is given by D Cr∕Ni =0.03 exp(−40 800∕ RT ) and in the range 350°−600°C is given by D Cr∕Ni...
When Permalloy films are annealed, the H c and H k of the as‐deposited films are observed to decrease and α, the dispersion angle, is seen to increase. Electron diffraction studies show the development of long‐range order in these films with annealing, as evidenced by the appearance of...
Theoretical consideration is given to the equation governing the shapes of molten zones when they are not necessarily surfaces of revolution. This equation is seen to reduce to equations previously given for both vertical and horizontal molten zones when the shape is a surface of revolution....
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