Influence of the 50K phase transition on the thermal expansion and electrical resistivity of α'-PdH_x

Cooling rate dependence of the resistivity increase during hydrogen (deuterium) ordering in Pd–H(D) and Pd–Fe–H(D) alloys

“…Because the resistivity decreases with the hydrogen ordering in a later stage of ordering, these results show that in these ranges of heating or cooling rates, the size of ordered domains are below the critical size which corresponds to the maximum resistivity [8,16].…”

“…The electrical resistivity of the Pd-and Pd based alloy-H(D) around 50 K exhibits a large hysteresis depending on cooling rate and/or heating rate [6][7][8][9][10]. However, the dependence has not been measured systematically until now.…”

“…It has been clarified in previous investigations [7,[10][11][12][13][14][15] with electrical resistivity and/or neutron scattering that the resistivity of their alloys increases by the structural ordering of the hydrogen (deuterium) atoms and decreases by the disordering. However, it should be also considered that the resistivity increase is limited in the early stage of the ordering [7,8,16].…”

Hydrogen migration in electron irradiated Pd based dilute alloys around the 50 K anomaly

“…It has been already clarified in previous investigations [1][2][3][4][5][6][7][8][9][10][11] that the electrical resistivities of Pd and Pd based-H(D) alloys increase by ordering of the hydrogen isotopes and decreases by disordering of the isotopes, though the behavior should be limited to the early stage of the ordering. Therefore, if the hydrogen atoms in the specimen disorder by electron irradiation, the resistivity of the specimen has to decrease.…”

Hydrogen migration in fast cooled Pd–H alloys around 50K

“…It has been already clarified by extensive studies with electrical resistivity measurement and neutron scattering measurement that the resistivity of Pd-H(D) alloys increases in the early stage of hydrogen ordering and decreases due to the disordering [2,5,[9][10][11][12][13][14][15][16][17]. The resistivity increase in the early stage and the decrease in the disordering are caused by the nucleation and growth of ordered domains and by the shrinking (when the size of the domains is smaller than the critical size) and/or disappearance of the domains, respectively.…”