Showing papers in "Physica D: Nonlinear Phenomena in 1951"

TL;DR: The magnetoresistance of pure Ni and Fe, of Ni-Fe-, Ni-Co, and Ni-Cu-alloys, and of Heusler's alloy has been measured at room temperature and at temperatures of liquid nitrogen and liquid hydrogen as discussed by the authors.

TL;DR: In this article, an explanation for the increase in resistance of certain thin metal films at low temperatures and small electrical field strengths is tentatively suggested, which seems to describe in principle the observed increase of resistance.

TL;DR: In this article, the electrical resistances of wires of silver-manganese alloys, with concentrations of manganese up to about 20 atomic percent, have been determined at low temperatures.

TL;DR: In this paper, the authors used a microwave bridge technique in conjunction with a superheterodyne method of reception to investigate, at 9500 Mc/s, the resonance spectra of Mn ++ ions in ZnS phosphors containing Mn as activator in various concentrations down to 10 −5, and in aqueous solutions of Mn-salts down to 0.01 N.

TL;DR: For some recent experiments thermodynamical data on nitrogen were required over as wide a temperature and pressure range as possible, and the experiments carried out in the Van der Waals Laboratory supplied these data only between 0° and 150°C for pressures up to 3000 atmospheres as discussed by the authors.

TL;DR: Using the heterodyne beat method, the dielectric constant of argon has been measured at 25°C and 125°C for pressures up to 2700 atmospheres.

TL;DR: In this paper, the authors show that a nuclear electric quadrupole can be coupled to a vibrating lattice in a line-shape manner, which is known as quadrupoles coupling.

TL;DR: In this paper, an expression for the magnetic field at a nucleus of a poly-atomic molecule with zero resultant orbital and spin angular momenta in an external magnetic field is developed for the electron contribution.

TL;DR: The vapour pressure of argon from pressures below 1 atmosphere to the critical point has been measured independently by observers in London and Amsterdam as discussed by the authors, and the results of the two determinations are in satisfactory agreement with each other and with previous determinations, excepting that of F. Born.

TL;DR: In this paper, the authors calculated the pressure-induced infrared absorption in the usually forbidden 0-1 vibrational band of hydrogen and deuterium by considering in detail the molecular distortions induced during binary collisions, which result in an absorption proportional to the square of the density (at constant volume).

TL;DR: In this article, the hydrodynamics of a fluid consisting of several components can be formulated in two different ways by applying the methods of the thermodynamics of irreversible processes; the first formulation is obtained if Gibbs' fundamental formula for the entropy per unit of mass of a system is assumed to be still valid when applied to the movement of the center of gravity of the system; statistically this corresponds to an approximate equilibrium velocity distribution function around the mean mass velocity, that is, to a normal transfer of impulse between the various components.

TL;DR: In this paper, a number of properties of polarized electron beams are investigated in view of an application to polarized beta-rays emitted from nuclei with aligned spins, and it is shown that in order to determine completely the polarization of a beam the determination of three independent orientation coefficients is necessary.

TL;DR: In this paper, the magnetostriction of homogeneous Ni alloys has been measured as a function of the composition of the alloy, of the induction caused by an external magnetic field and of the temperature.

TL;DR: In this paper, the Soret effect has been studied by an optical method which is described in terms of the optical Soret coefficient as a function of the mole fraction for the systems presenting a sufficient separation.

TL;DR: In this paper, the influence of electric and magnetic fields on the spin orientation (polarization) of electrons in a beam is calculated according to the Pauli spin theory and the Dirac theory.

TL;DR: In this paper, the authors investigated the breakdown field strength of Thuringian glass at room temperature and at low temperature (−180°C) and showed that the field strength is nearly independent of temperature.

TL;DR: In this article, the viscosity of gaseous 3He has been calculated using the general quantummechanical expressions for the coefficient of visco-viscosity.

TL;DR: In this paper, the variation of the resistivity with elastic deformation of Cu, Ag, Au, Al, Mo, W, Pt, and some alloys was measured on wires and on foils.

TL;DR: Using the experimental data of the Larmor line width and of the spin specific heat, the magnitude of the exchange interaction between the nickel ions in nickel fluosilicate crystal was analyzed in this paper.

TL;DR: In this paper, it was pointed out that one runs into difficulties when one tries to calculate the adiabatic change in a system on sufficiently slow variation of an external parameter by purely dynamical methods applied to a canonical ensemble.

TL;DR: In this paper, the authors measured the viscosity of liquid helium and found that it was approximately constant between 4.2 and 2.6°K, contrary to earlier measurements.

TL;DR: In this article, it was found that absorption with | Δm | > 1 occurs and that these have to be ascribed to the influence of crystalline electric fields, and an interpretation of the absorption peak at 1 3 of the central peak field strength was given.

TL;DR: In this paper, a description of experiments of ferromagnetic resonance in thin films of nickel was given, where the films were prepared by evaporation onto mica and were from 0.1μ to 3μ thick.

TL;DR: In this paper, a lens type spectrometer with an annular exit slit is described, and an experimental method for the adjustment of this slit was described, which has a transmission of one per cent and a line width of 2, 3 or 4 per cent.

TL;DR: The fine structure of the proton magnetic resonance line in single-crystals of CuSO4·5H2O and CuCl2·2H 2O has been observed as discussed by the authors.

TL;DR: In this paper, a general formula is derived for the transition probability of an allowed β-transition, in which the direction of emission of electron and neutrino, the polarization of the electron and the orientation of the nuclear spin are taken into account.

TL;DR: In this article, it has been found that the magnetization of sintered ceramic ferrites with a high permeability is brought about by at least two processes, one of which, in the frequency range covered, is independent of frequency and determines the initial permeability.

TL;DR: In this article, the results of the Stern-Gerlach experiment were used to detect magnetic resonance of the 6 3 P 1 state of mercury, which can be used for the analysis of metastable states and the study of hyperfine structure Zeeman patterns in weak fields.