Pressure-induced superconductivity in Li and Fe

We have developed complex extreme condition of very low temperature down to 30 mK and very high pressure exceeding 200 GPa by assembling compact diamond anvil cell (DAC) on a powerful He-3/He-4 dilution refrigerator. Using the apparatus and techniques, we have searched for pressure-induced superconductivity in various materials under pressures. In this paper, our experimental techniques and the examples of pressure-induced superconductivity in Li and Fe are reviewed. (C) 2004 Elsevier B.V. All rights reserved.