Dresden 2006 – wissenschaftliches Programm
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TT: Tiefe Temperaturen
TT 8: Correlated Electrons: Heavy Fermions
TT 8.3: Vortrag
Montag, 27. März 2006, 15:00–15:15, HSZ 301
High pressure study of YbIr2Si2 — •M. Nicklas, H. Q. Yuan, Z. Hossain, C. Geibel, and F. Steglich — Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Straße 40, 01187 Dresden, Germany.
We present a high pressure study of the electrical transport properties of the heavy fermion compound YbIr2Si2 in the temperature range down to 60 mK and for pressures up to 10 GPa. On basis of the resistivity data we establish a pressure-temperature phase diagram. At atmospheric pressure YbIr2Si2 exhibits a Landau Fermi-liquid state below 200 mK which persists upon applying pressure. For P≥ 7 GPa a drop in resistivity indicates the development of antiferromagnetic order at low temperatures. The Neél temperature is increasing with further increasing pressure. We compare our results on YbIr2Si2 to YbRh2Si2.