Materials Literature
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The reversal of the spontaneous polarization in a ferroelectric crystal is governed by two mechanisms: the nucleation of new domains and the growth of these domains by domain wall motion. We have investigated the switching properties of triglycine sulfate (TGS) as a function of applied electric field, temperature, and…
Abstract According to a recent theory of the glassy state, chain stiffness is the main determinant of the glass transition. In this paper the theory is applied to the problem of predicting the glass temperatures of copolymers of varying composition and therefore varying chain stiffness. It is found that a simplified t…
SCOPUS: le.j
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System of equations governing nonlinear bending of plates consisting of two or more bonded thin layers; effects of both transverse and in-plane loading and thermal gradients through plate thickness as well as over plate faces are given; specialization of equations for particular classes of problems.
As an example of a mounting in which the optical components are not on the Rowland cylinder, the Seya-Namioka mounting is treated mainly from the standpoint of physical optics. An ambiguity in the physical meaning of Beutler’s focal conditions is clarified; using the corrected condition a brief summary of the optical…
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An attempt is made to account for the observed birefringence of the various types of polypropylene spherulite in terms of preferred crystalline orientation. Evidence is also presented showing that some of these spherulites crystallize with a new metastable crystal structure, not previously described.
A survey has been made of spherulites formed by the isothermal crystallization of polypropylene from the melt in the temperature range 110°–148°C. Four types of spherulite have been distinguished and their structural morphology, optical properties, melting behavior, and growth rates have been examined.
An empirical method for determining the crystallinity of native cellulose was studied with an x-ray diffractometer using the focusing and transmission techniques. The influence of fluctuations in the primary radiation and in the counting and recording processes have been determined. The intensity of the 002 interferen…
Calorimetric optical absorption measurements at 4.2\ifmmode^\circ\else\textdegree\fi{}K have been made on a representative series of $\ensuremath{\alpha}$ brasses over the wavelength range 0.23 to 4.0 microns using electropolished bulk specimens. Changes in the absorption spectrum below 6000 A are interpreted in the l…
Measurements have been made of the Curie points and magnetic moments of three series of compounds (Laves phases) $M{\mathrm{Ir}}_{2}$, $M{\mathrm{Os}}_{2}$, and $M{\mathrm{Ru}}_{2}$, where $M$ is a rare-earth element. The Curie point is highest (85\ifmmode^\circ\else\textdegree\fi{}K) for the compounds containing Gd a…
Electron-spin resonance of bound substitutional nitrogen donors in diamond is observed and discussed. The $g$ factor is isotropic at 2.0024\ifmmode\pm\else\textpm\fi{}0.0005. For a given donor, one of the C-N bond directions is a hyperfine axis with constants $A=40.8$ oersteds, $B=29.2$ oersteds. There are thus four t…
Abstract Metallorganische Verbindungen reagieren in verschiedener Weise mit molekularem Sauerstoff. Alkyl‐Metall‐Verbindungen werden zu Metallalkyl‐peroxyden oxydiert. Aus den Alkali‐Addukten aromatischer Kohlenwasserstoffe entstehen Alkali‐peroxyd und Kohlenwasserstoff. Aryl‐Metall‐Verbindungen schließlich ergeben al…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation R. C. Hall; Forced Magnetostriction of Nickel. Journal of Applied Physics 1 September 1959; 30 (9…