Connection of thermopower, magnetothermopower with resistivity and magnetoresistance in manganites with Nd and Sm

Thermopower, magnetothermopower resistivity and magnetoresistance of single crystal samples Re(1-x)SrxMnO3 (0 ≤ x ≤ 0.3, Re = Nd, Sm) were studied in wide temperature interval, included the Curie temperature TC. Giant maxima of resistivity and thermopower, very big negative magnetothermopower and magnetoresistance were found in TC region. So, a giant maximum of thermopower in TC was found, which suppressed by magnetic field. Simultaneous magnetic field destroys magneto-impurity states – ferrons as evidenced the maxima resistivity and magnetoresistance in TC Hence it follows that giant thermopower in manganites are produced by ferrons and its value is set by the quantity of impurities, that is the concentration of impurities and the volume of sample.

Structural and physical properties of a new reversible and continuous thermochromic ionic liquid in a wide temperature interval: [BMIM]4[Ni(NCS)6]

Continuous and reversible solar-responsive thermochromism in [BMIM]4[Ni(NCS)6], an ionic liquid that withstands numerous heating–cooling cycles.

Production, Properties and Application of Ultrafine-Grained Titanium Alloys

Some features ofstructure, way of production and mechanical properties of titanium andtwo-phase titanium alloys with ultrafine-grained (UFG) microstructure werediscussed. Various methods of UFG structure formation was considered andoptimal conditions for attaining of a homogeneous microstructure with thesmallest grain size were determined. The kinetics of microstructure evolutionin titanium and two-phase titanium alloys during large (severe) plasticdeformation in a wide temperature interval and the mechanisms of ultrafinegrain formation were analyzed. The influence of grain size on static mechanicalproperties was determined. Significantly reduced temperatures of superplasticforming of the UFG conditions were shown. Some examples of practical applicationsof the UFG two-phase titanium alloys were discussed.