Showing papers in "Materials Research Bulletin in 1973"

TL;DR: In this article, the possibility of a new kind of electronic state corresponding roughly to Pauling's idea of resonance valence bonds in metals was pointed out, and an estimate of its energy was made in one case.

TL;DR: The first high temperature superconducting oxide compound is Li1+xTi2−xO4 and has the face-centered cubic spinel structure, with a o ≊ 8.40 A.

TL;DR: In this article, the transport properties of the delectrons of La2NiO4, Sm2CuO4 and Nd2NiOsO4 are explained in terms of the structure and the nature of delectron.

TL;DR: The crystal structure of (Sr0.9Ba0.1)Bi2Ta2O9 has been refined to elucidate the nature of the lower phase transition observed in even-layered members of the bismuth titanate family.

TL;DR: The Pb0.92Mo6S7.5 compound is a member of the ternary sulfide series MXMo3S4 where M = Ag, Sn, Ca, Sr, Pb, Ba, Cd, Zn, Mg, Cu, Mn, Cr, Fe, Co, Ni, Li, Na, Sc, and Y as mentioned in this paper.

TL;DR: In this article, the electrical properties of thin films of the amorphous alloy As 2 Se 5 were investigated and the memory switching behavior of this material was also reported, showing a Poole-Frenkel effect.

TL;DR: In this paper, a double-crystal X-ray diffraction technique has been applied to the lattice constant measurement of SrTiO 3 in the temperature range 17 to 300 K.

TL;DR: In this paper, resistivity and thermoelectric-power data for the tetragonal compounds Ln2NiO4 and Ln 2CuO4 are interpreted qualitatively in terms of narrow energy bands of strongly correlated d-like electrons.

TL;DR: In this article, the growth kinetics of Epitaxial magnetic films of Eu 1.1 Yb 1.9 Fe 5 O 12 have been described by an analytical model involving diffusion (D≅3·10 −5 cm 2 /sec) through a stagnant boundary layer and subsequent integration into the film according to a first order reaction.

TL;DR: In this paper, single crystals of Pb 3 (PO 4 ) 2 were grown by the Czochralski technique and the predicted number of domain walls have been observed.

TL;DR: By means of neutron diffraction it has been possible to observe ordering of Zn and Ge atoms in the normal tetrahedral compound ZnGeN 2. The structure is thus of FeNaO 2 type, with space group Pna2 1.

TL;DR: In this article, the difference between the magnitudes and thermal evolutions of the magnetic susceptibilities are explained in terms of ferromagnetic vs antiferromagnetic superexchange enhancement and large vs small spin polarons associated with excited states.

TL;DR: The lattice constants of more than 40 compounds A 2 BMF 6 are reported in this paper, where the occurence of cubic (type K 2 NaAlF 6 ) and hexagonal (type Cs 2 NaCrF6 ) structures is discussed as governed by the modified Goldschmidt tolerance factor of the compounds.

TL;DR: The high temperature polymorph of AgInS2 has been found to be orthorhombic with a =7.001, b =8.278, c =6.698 A, space group probably Pna21 with a distorted wurtzite structure as mentioned in this paper.

TL;DR: In this article, the discovery of two new ferromagnetic semiconducting compounds containing molybdenum was reported, which are Ga0.5Mo2S4 and Ga 0.5 Mo2Se4 with a spinel structure at room temperature and Curie points at 16°K and 23°K respectively.

TL;DR: In this article, the stability range of the cubic spinel structure in the CuxMn3−xO4-system was determined with x-ray diffraction on quenched specimens.

TL;DR: In this article, the authors describe an investigation of the binary borosilicate glass system which has led to the realization of a promising cladding material for pure fused silica core fibers.

TL;DR: In this paper, the problems associated with the Czochralski growth of YVO4 including melt composition, inclusions, color center formation, thermal gradient, cleavage, growth axis and dislocations are discussed.

TL;DR: In this paper, the monoclinic-to-tetragonal structure transition of oxides V1−xMox02 with 0≤ x ≤ 0.20 has been studied by means of DTA, X-ray diffraction, magnetic susceptibility (powder samples) and electrical conductivity (single crystals) measurements within the temperature region 80 K to 400 K.

TL;DR: In this article, the antiferromagnetic, semiconductor, and metal phase boundaries in NiS 2−x Se x are reported as a function of the composition x by use of four techniques: electrical resistivity, magnetic susceptibility, calorimetry, and x-ray structure.

TL;DR: In this article, it was shown that monoclinic hydrothermally grown hydroxyapatite and deuterohydroxyapatitite single crystals undergo a reversible transition to hexagonal symmetry at 211.5°C.

TL;DR: In this paper, single crystals of the title compounds with Ln = La, Ce, Pr, Nd, Sm, and Eu have been grown by the Czochralski technique, and their cell parameters and melting points were determined accurately.

TL;DR: In this article, it was shown that the A I B 2 X 6 pyrochlores of RbCoCrF 6, RbNb 2 O 5 F, TlNb2 O 6 F, and Tl Nb 2O 5 F are not significantly displaced in homologous compounds, however, the radius of the 8b cavity is well adapted to this cavity.

TL;DR: In this paper, the heat capacity of VO2 was measured both above and below the transition temperature range of 330 − 345 K for 150 µm for the same VO2 model.

TL;DR: In this article, the phase diagram of the system V 1−x Cr x O 2 (0 ⩽ x⩽ 0.15) by magnetic susceptibility and X-ray diffraction measurements was determined.

TL;DR: In this paper, an epitaxial magnetic garnet film containing Ge 4+ and Si 4+ was grown by conventional dipping techniques using the PbO·B 2 O 3 flux system.

TL;DR: Oxygen stoichiometry and manganese valences have been determined for REnO 3 phases prepared in air where RE are the rare earths from Nd to Lu including Y but excluding Tb.

TL;DR: In this article, a control circuit for pulling uniform cross section crystals from the melt is described, where the output of a sensor that monitors an R.F. power source is compared to a reference voltage by a controller and the difference is used to adjust the current to a saturable core reactor that feeds a generator.

TL;DR: In this paper, the electrooptic coefficients of two new chalcogenides LiInS2 and LiInSe2 have been determined based on the anharmonic oscillator model, which has been found to hold for a wide variety of oxides also holds for these materials.

TL;DR: In this article, the authors divide the Cu and Cr-thiospinels into three groups on account of the cation-anion-distances, and the model of Lotgering and van Stapele correspond to the valence distribution.