The Doniach diagram and hydrogenation of the ternary compounds CePdIn and CePdSn
نویسندگان
چکیده
The hydrogenation process of the antiferromagnetic compounds CePdIn and CePdSn has been studied. Investigation of the new hydrides CePdInH and CePdSnH by X-ray powder diffraction shows that they adopt the same crystal symmetry as the original intermetallic but the unit cell volume increases during the hydrogenation. Magnetization, electrical resistivity, thermoelectric power and Sn Mössbauer spectroscopy measurements reveal that CePdInH and CePdSnH order antiferromagnetically below TN = 3.0(2) K and 5.0(2) K respectively. Moreover, the physical properties of the hydrides are less influenced by the Kondo effect. The changes of Néel temperature involved by H-insertion are explained on the basis of the Doniach’s diagram considering the competition between Kondo and RKKY interactions.
منابع مشابه
Ternary Phase Diagram Modeling of Chiral Medetomidine Salts Using NRTL-SAC Model
Experimental determination of solubility and ternary phase diagram of chiral compound are of tedious and time consuming tasks, and in many cases, there is not enough experimental data for different enantiomeric compositions to access the experimental ternary phase diagram. Using thermodynamic models with predictive capability, having less dependency on experimental data, affords a great advanta...
متن کاملBTX Hydrogenation in liquid phase using nanoparticles of Cobalt/MWCNTs and data analysis using RSM method
BTX compounds (Benzene, toluene and xylenes) are the main pollutants in air and fuels. Recent environmental legislations are limited the amount of these materials specially the amount of benzene in gasoline due to its carcinogen effects on health. In this research, the BTX hydrogenation was carried out using nanoparticles of Co supported on MWCNTs (multiwall carbon nanotubes) and AC (activated ...
متن کاملRevisited Doniach diagram: Influence of short-range antiferromagnetic correlations in the Kondo lattice
The Kondo lattice model including nearest-neighbor magnetic exchange interactions is studied here in a mean-field approximation describing both the Kondo state and the intersite magnetic correlations. In the case of antiferromagnetic correlations, our model yields a decrease of the Kondo temperature compared to the one-impurity value, giving, therefore, a ‘‘revisited’’ version of the Doniach di...
متن کاملPhase Equilibria of the Ternary System Water + Phosphoric Acid + 1-Nonanol at Different Temperatures
The purpose of this reaserch is to measure the phase equilibrium data of the ternary system (water + phosphoric acid + 1-nonanol) at different temperatures. Experimental solubility curves and tie-line points for the system were obtained at T = 298.2, 308.2 and 318.2 K and ambient pressure. The binodal curve data were detected by the cloud point method. The mass fractions of each layer ...
متن کاملNano-Crystalline Mg(2-x)MnxNi Compounds Synthesized by Mechanical Alloying: Microstructure and Electrochemistry
Mechanical alloying of binary and ternary elemental powder mixtures with the nominal compositions of Mg2Ni and Mg(2-x)MnxNi (x= 0, 0.05, 0.10 and 0.15 at. %) were carried out in a planetary ball mill for various milling times of 5, 10, 15, 20, 30 and 60 h. X-ray diffraction and field emission scanning and transmission electron microscopy were used for the characterization of the milled products...
متن کامل