Instabilities in Doped Lanthanum Chromite in Reducing Environments
نویسندگان
چکیده
منابع مشابه
Thermal expansion of doped lanthanum gallates
Thermal expansion of several compositions of Sr and Mg-doped LaGaO3 including an A-site deficient composition (La0⋅9Sr0⋅1)0⋅98(Ga0⋅8Mg0⋅2)O2⋅821 were measured in the temperature range from 298 to 1273 K. The effect of doping on thermal expansion was studied by varying the composition at one site of the perovskite structure (either A or B), while keeping the composition at the other site invaria...
متن کاملThermoelectric Properties of Lanthanum-Doped Europium Titanate
The thermoelectric properties of lanthanum-doped polycrystalline perovskite-type europium titanate were measured from room temperature to 900K and compared to those of MTiO3 (M 1⁄4 Ca, Sr, Ba). The differences in the titanates were calculated in terms of the differences of A-site ion and Ti–O distance that determined the covalent bonding strength. The A-site ion appeared to have little influenc...
متن کاملLaser action in Nd(3+)-doped lanthanum oxysulfide powders.
We have investigated the stimulated emission properties of Nd(3+) doped La(2)O(2)S powders at room temperature as a function of pumping energy density, excitation wavelength, and Nd(3+) ion concentration. The absolute stimulated emission energy has been measured. Expressions for the slope efficiencies and lasing thresholds as a function of rare earth concentration and pumping wavelengths, which...
متن کاملIntrinsic Mobility Limiting Mechanisms in Lanthanum-Doped Strontium Titanate
The temperature dependent Hall mobility data from La-doped SrTiO3 thin films are analyzed and modeled considering various electron scattering mechanisms. We find that a ∼6 meV transverse optical phonon deformation potential scattering mechanism is necessary to explain the dependence of transport on temperature between 10–200 K. Also, we find that the low temperature electron mobility in intrins...
متن کاملMagnetic Phases and Possible Magnetic Pairing in Doped Lanthanum Cuprate
We discuss the temperature-concentration (T-x) phase diagram of La2-x(SrlBa)xCuO4. The magnetic interactions of the hole spins with the Cu spins yield frustration, explaining the fast decrease in the NEel temperature and yielding a new spin glass phase. The same interactions yield a strong attractive hole-hole potential, which can lead to pairing and superconductivity. 1. INTRODUCTION Both La2....
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ژورنال
عنوان ژورنال: ECS Proceedings Volumes
سال: 1995
ISSN: 0161-6374,2576-1579
DOI: 10.1149/199501.0944pv