caa a22 4500 445366133 CHVBK 20180317142931.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1007/s10909-010-0327-8 doi (NATIONALLICENCE)springer-10.1007/s10909-010-0327-8 Low T Study of PdH x System by Torsional Oscillator Technique: x Dependent Responses [Elektronische Daten] [Shuji Harada, Toshiaki Donuma, Hideaki Araki, Tomoka Kakuta, Ryota Nakatsuji, Robert Mueller, Minoru Kubota] Hydrogen atoms dissolve in Pd at densities up to one H atom per Pd, which provides higher atomic H density than in solid H2. They are known to have large diffusion coefficient due to quantum tunneling. Torsional oscillator(TO) technique is employed to investigate the phases of H in Pd, which is known to show phase boundaries at the lowest T among metal-hydrogen (MH) systems. Specific heat measurements have been performed for PdHx with x up to high H concentration specimens as well as studies of the resistivity study to establish the unique x−T phase diagram. We have, in addition, been performing TO experiments, in order to study the effect of atomic H intrusion and the dynamics in the PdH(D)x system. The TO is a well-established, powerful instrument method to investigate superfluidity and quantum vortices of liquid He, especially in thin films, as well as dislocation dynamics in solids. In our TO experiments on PdHx specimens have shown a resonance frequency shift for PdHx, with 0.16≤x≤0.75 at the lowest T's, which can be largely explained by the lattice deformation by H intrusion. This x dependent contribution has a smaller, additional change depending on x and T above ∼50K. We will show the details of experimental data and discuss the correspondence to the phonon modes change and further possibility of studying occurrence of quantum phenomena for the hydrogen system. Springer Science+Business Media, LLC, 2010 Hydrogen nationallicence Palladium nationallicence Torsional oscillator nationallicence Frequency shift nationallicence Phonon modes nationallicence Harada Shuji Faculty of Engineering, Niigata University, Ikarashi 2-8050, Nishi-ku, 950-2181, Niigata, Japan aut Donuma Toshiaki Graduate School of Sci. & Tech., Niigata University, Ikarashi 2-8050, Nishi-ku, 950-2181, Niigata, Japan aut Araki Hideaki Nagaoka National College of Technology, Nishikatakai 888, Nagaoka, 940-8532, Niigata, Japan aut Kakuta Tomoka Institute for Solid State Physics, University of Tokyo, Kashiwanoha 5-1-5, Kashiwa-shi, 277-8581, Chiba, Japan aut Nakatsuji Ryota Institute for Solid State Physics, University of Tokyo, Kashiwanoha 5-1-5, Kashiwa-shi, 277-8581, Chiba, Japan aut Mueller Robert Institute for Solid State Physics, University of Tokyo, Kashiwanoha 5-1-5, Kashiwa-shi, 277-8581, Chiba, Japan aut Kubota Minoru Institute for Solid State Physics, University of Tokyo, Kashiwanoha 5-1-5, Kashiwa-shi, 277-8581, Chiba, Japan aut Journal of Low Temperature Physics Springer US; http://www.springer-ny.com 162/5-6(2011-03-01), 724-732 0022-2291 162:5-6<724 2011 162 10909 https://doi.org/10.1007/s10909-010-0327-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10909-010-0327-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Harada Shuji Faculty of Engineering, Niigata University, Ikarashi 2-8050, Nishi-ku, 950-2181, Niigata, Japan aut NATIONALLICENCE 700 1- Donuma Toshiaki Graduate School of Sci. & Tech., Niigata University, Ikarashi 2-8050, Nishi-ku, 950-2181, Niigata, Japan aut NATIONALLICENCE 700 1- Araki Hideaki Nagaoka National College of Technology, Nishikatakai 888, Nagaoka, 940-8532, Niigata, Japan aut NATIONALLICENCE 700 1- Kakuta Tomoka Institute for Solid State Physics, University of Tokyo, Kashiwanoha 5-1-5, Kashiwa-shi, 277-8581, Chiba, Japan aut NATIONALLICENCE 700 1- Nakatsuji Ryota Institute for Solid State Physics, University of Tokyo, Kashiwanoha 5-1-5, Kashiwa-shi, 277-8581, Chiba, Japan aut NATIONALLICENCE 700 1- Mueller Robert Institute for Solid State Physics, University of Tokyo, Kashiwanoha 5-1-5, Kashiwa-shi, 277-8581, Chiba, Japan aut NATIONALLICENCE 700 1- Kubota Minoru Institute for Solid State Physics, University of Tokyo, Kashiwanoha 5-1-5, Kashiwa-shi, 277-8581, Chiba, Japan aut NATIONALLICENCE 773 0- Journal of Low Temperature Physics Springer US; http://www.springer-ny.com 162/5-6(2011-03-01), 724-732 0022-2291 162:5-6<724 2011 162 10909 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer