Showing papers in "Solid State Communications in 1970"

TL;DR: In this paper, single crystals of BiFeO3 of perovskite structure were grown with dimensions of greater than 1 mm from a Bi2O3 flux and dielectric hysteresis loops were measured on these crystals.

TL;DR: In this article, the crystal and magnetic structures have been investigated by neutron diffraction in Mn285Ga115 and the high temperature quenched DO19 phase has a triangular antiferromagnetic structure with magnetic moments.

TL;DR: From a simultaneous observation of the ESR of the paramagnetic Li center and the yellow emission of ZnO, especially its polarization, it was concluded that this luminescence band is due to a recombination of an electron with the neutral Li acceptor.

TL;DR: In this article, the location of the states added by the hydrogen atom is determined and leads to a new model for understanding metal hydrides, and a non-rigid band model is invoked to elucidate phase changes and semiconducting behavior for x non-integral.

TL;DR: In this paper, the eigenvectors of the phonon modes Γ 1 and Γ 3 were determined, and it was shown that α-GeTe is a displacive ferroelectric in which the longitudinal optical mode is perfectly screened by the conduction electrons.

TL;DR: In this article, a simple relationship between Vth and Tg was obtained: Vth ʗ exp (C. Tg), where Vth = threshold voltage for switching, and tg = glass transition temperature.

TL;DR: In this paper, the phonons and electrons of n-type gallium nitride have been studied using first order Raman spectroscopy and infrared reflectivity and the values of the allowed optical phonon frequencies, the dielectric constants, the optical electron mass and relaxation time, and the Born effective charge are reported.

TL;DR: In this article, the Verwey transition is removed by measuring untwinned single crystals in a magnetic field, and the single crystal spectrum is then resolved into five individual components corresponding to a tetrahedral Fe +3, two octahedral Fe+3 and two octagonal Fe +2 sites.

TL;DR: In this article, it was proposed that the distortion arises from a Jahn Teller splitting of an accidently degenerate pair of low lying Dy3+ doublets, which is correlated with the direction of principal g value and can be influenced by applied magnetic fields.

TL;DR: In this article, the optical absorption of the rare earths Ce, Pr, Nd and Sm has been measured in the energy region 100 eV − 180 eV. Synchrotron radiation of DESY was used as a light source.

TL;DR: The sites occupied by the interstitial fluorine atoms in calcium fluoride-yttrium fluoride solid solution have been determined by powder neutron diffraction as discussed by the authors, and a striking similarity between the defect structure of (Ca/Y) F 2+x and that of UO 2+ x.

TL;DR: In this paper, it was shown that the paramagnetic polaron appears discontinuously for decreasing temperature with nearly saturated 4 ¼ spin moments within it, and it was estimated that, even in EuSe, a stable magnetic polaron is unlikely to exist.

TL;DR: In this paper, the pseudopotential scheme of Lin and Kleinman was used to calculate the energy bands of PbTe, PbSe and PbS in very good agreement with experiment.

TL;DR: In this paper, the intensity of core electrons photoexcited by soft X-ray has been determined as a function of the thickness of deposited metal films, and an escape depth of (22 ± 4) A is obtained for 1.2 keV electrons in gold.

TL;DR: The application of rate theory to the kinetics of localized electronic transport yields a temperature and field dependent drift mobility relationship as discussed by the authors, which is consistent with recent experimental results on the transport properties of amorphous semiconductors.

TL;DR: In this paper, lines in the EPR spectrum of ZnO crystals irradiated by 3.6 × 10 18 cm −2 fast neutrons are ascribed to holes on oxygen atoms in the basal plane of O 4 tetrahedra which surround Zn vacancies.

TL;DR: In this article, the authors studied the structural phase transition in KMnF3 at 186.6°K and 91.5°K, and found that the soft phonon mode intensities diverge in a manner that is typical of a second order phase transition.

TL;DR: An anomalous decrease of spontaneous polarization P s of ammonium sulfate single crystals with decreasing temperature was reported in this paper, where a maximum value, P s max = 0.62 μ Ccm −2, was measured at −51.5°C.

TL;DR: In this paper, the fundamental absorption edge of AlAs and AlP was investigated by optical transmission measurements from 2° to 300°K, and the absorption edge structure in AlAs is consistent with the conduction band minima at or near X.

TL;DR: In this article, a photoluminescent peak was obtained at 3.477 eV; its temperature dependence was reported, and a doublet was observed in 3.37 eV.

TL;DR: In this paper, photoexcited "hot" LO phonons were observed in GaAs and an order of magnitude estimate of LO phonon lifetime was obtained, which is consistent with the estimate from the linewidth in Raman scattering.

TL;DR: In this paper, it has been shown that the lattice mobility of holes in III-V compounds is limited primarily by acoustic and nonpolar optical mode scattering, and the strength of these scattering mechanisms is determined by the coupling parameters E AC and E NPO.

TL;DR: In this article, monodomain SrTiO 3 crystals were found in less than 0.3 mm thick (110) plates below the cubic-to-tetragonal phase transition.

TL;DR: The properties of β-Tb 2 (MoO 4 ) 3 are very similar to those of βGd 2 (Gd 3 ) 3 and β-Gd 4 (Mo O 4 ) 2 as mentioned in this paper.

TL;DR: In this article, the moments magnetiques deduits de l'etude par diffraction neutronique sont: M = 1,8 ± 0,1μB dans légende antiferromagnetique a 4,2°K, M = 2.2 ± 0.1μb dans leetat ferromagnetic a 170°K and M =1,3μB par mesure magnetique extrapolee a 0°K.

TL;DR: In this paper, a study of the far infrared reflectivities of Ga 1− x In x As, GaAs 1 − x Sb x and InAs 1− X Sb X indicates two long wave optical phonon modes over only a part of the composition range.

TL;DR: In this paper, temperature dependence of the threshold voltage for switching phenomenon was measured in amorphous materials both of AsxTeyGe10 and AsxTeGeSi10 systems, and a simple experimental relationship Vth = K. exp[C.c.

TL;DR: In this paper, the influence of certain heat treatments on the coercivity of SmCo 5 was investigated and a model, accounting for the high coercivity was proposed, which is based on pinning rather than on nucleation of domain walls.

TL;DR: The energy band structure of Yb has been calculated as a function of volume by the RAPW method as mentioned in this paper, and it is suggested that this causes the metal-semiconductor and α-β phase transitions.

TL;DR: In this paper, the spinel form of Fe3S4 has been prepared hydrothermally and two distinct patterns associated with iron on antiparallel sublattices in A and B sites were identified.