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A new magnetic symmetry of the rare-earth orthochromites and orthoferrites ($\mathrm{RM}{\mathrm{O}}_{3}$) below the second N\'eel temperature due to the reordering of the rare-earth spins is proposed. It is shown that the magnetic symmetry group is lowered to the subgroup of index two, thereby keeping the unit cell i…
Thermal decomposition of silicon diimide, Si(NH) 2 , in vacuum resulted in very‐high‐purity, fine‐particle‐size, amorphous Si 3 N 4 powders. The amorphous powder was isothermally aged at 50° to 100° intervals from 1000° to 1500°C for phase identification. Examination of ir spectra and X‐ray diffraction patterns indica…
In recent years a wide variety of methods has been used to describe the polarization characteristics of ultra low frequency (10−3 to 1 Hz) magnetic fields. This paper gives a more complete outline of some of the descriptions derived from the spectral matrices of n-variate stochastic processes. The matrices are expande…
(1973). Quantum properties of surface space-charge layers. C R C Critical Reviews in Solid State Sciences: Vol. 4, No. 1-4, pp. 499-514.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectron spectroscopy for chemical analysis of nickel compoundsC. A. Tolman, W. M. Riggs, W. J. Linn, C. M. King, and R. C. WendtCite this: Inorg. Chem. 1973, 12, 12, 2770–2778Publication Date (Print):December 1, 1973Publication History Published online1 May 2002Published in…
Abstract Aqueous solutions of poly(vinyl alcohol) were submitted to varying doses of electron beam irradiation. By modification of the classical Flory‐Huggins equations appropriate to the initial state of solution of the polymer, the molecular weight between crosslinks, M c , was calculated as a function of radiation…
The existence of depolarization fields in thin ferroelectric films is experimentally demonstrated by investigating an unconventional electrode-ferroelectric configuration consisting of a triglycine sulphate (TGS) film sandwiched between a gold and a doped-silicon electrode. Due to nonidentical electrodes, the compensa…
The phonon dispersion relations of ZrC, NbC, HfC, TaC, and UC are investigated using a phenomenological-model theory. For the transition-metal carbides, a shell model with a free-electron screening is used to describe the over-all shape of the phonon curves. The results strongly support the "covalent model," where the…
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Share Icon Share Twitter Facebook Reddit LinkedIn Reprints and Permissions Cite Icon Cite Search Site Citation E. A. Nesbitt, J. H. Wernick, T. R. McGuire; Rare Earth Permanent Magnets. Physics Today 1 December 1973; 26 (12): 59–60. https://doi.org/10.1063/1.3128366 Download citation file: Ris (Zotero) Reference Manag…
Electrical conduction in polymers under a relatively low applied electric field is considered to be ionic and is affected strongly by the structural factors of the polymers. The following equation for the electrical conductivity σ was derived in which free volume Vf, jump energy Ej, and ionic dissociation energy W wer…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTX-ray photoelectron spectroscopy of nickel compoundsJ. Matienzo, Lo I. Yin, Samue O. Grim, and William E. Swartz Jr.Cite this: Inorg. Chem. 1973, 12, 12, 2762–2769Publication Date (Print):December 1, 1973Publication History Published online1 May 2002Published inissue 1 Decem…
Intense broadband emission in the visible is observed from crystals of Bi4Ge3O12 under optical and x-ray excitation. From measurements of absorption, reflection, fluorescence, and excitation spectra, the emission is assigned to 3P1 → 1S0 transitions of Bi3+. The Stokes shift is large, [inverted lazy s]14 000 cm−1. The…