NUKLEONIKA 2006, 51(Suppl. 1):s73-s77

HIGH PRESSURES STUDIES ON HYDRIDES OF SELECTED MANGANESE ALLOYS

Hiroshi Sugiura1, Stanis³aw M. Filipek2, Valerie Paul-Boncour3, Irina Marchuk2, Ru-Shi Liu4, Su Il Pyun5

1 Faculty of Science, Yokohama City University, 22-2 Seta, Kanazawa-ku, Yokohama 236, Japan
2 Institute of Physical Chemistry of the Polish Academy of Sciences, 44/52 Kasprzaka Str., 01-224 Warsaw, Poland
3 Laboratoire de Chimie Métallurgique des Terres Rares, CNRS, 2-8 rue H. Dunant, 94320 Thiais, France
4 Department of Chemistry, National Taiwan University, Taipei, Taiwan
5 Department of Materials Science and Engineering, KAIST, Daejeon 305-701, Korea

Specific behavior found in hydrides formed in manganese, Mn-Ni and YMn2 under high pressure is presented and discussed. The synthesis of ferromagnetic fcc-manganese was proved. Parameters of the equations of state (EOS) derived from measurements in the diamond anvil cell (DAC) are summarized for manganese hydrides and for hydrides derived from YMn2 Laves phase. It was found that the compression behavior of recently discovered YMn2H6 is different from YMn2-based hydrides with lower hydrogen content.