Low-temperature high-field magnetization of YbRh2Si2 and YbIr2Si2 under hydrostatic pressure

✍ Scribed by Y. Tokiwa; P. Gegenwart; Z. Hossain; J. Ferstl; G. Sparn; C. Geibel; F. Steglich

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 138 KB
• Volume: 378-380
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/j.physb.2006.01.271

✦ Synopsis

We report low-temperature ðTX40 mKÞ magnetization measurements on YbRh 2 Si 2 and YbIr 2 Si 2 at magnetic fields up to 11.5 T and under hydrostatic pressure Pp1:35 GPa. The magnetization slope in YbRh 2 Si 2 changes drastically under pressure, while that of YbIr 2 Si 2 is less sensitive to pressure. Isofield MðTÞ curves of YbIr 2 Si 2 under pressure up to 1.35 GPa saturate at low temperatures without signature of a magnetic transition. Thus, YbIr 2 Si 2 has Landau Fermi liquid ground state up to 1.35 GPa and larger pressure is needed to reach the quantum critical point and to induce magnetic order.