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Journal Article

Pressure studies of quantum critical effects in CeCu2Si2 and CeNi2Ge2

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Hellmann, P., Donnevert, L., Thomas, S., Geibel, C., Sparn, G., & Steglich, F. (1996). Pressure studies of quantum critical effects in CeCu2Si2 and CeNi2Ge2. Czechoslovak journal of physics, 46, 2591-2592. doi:10.1007/BF02570282.

Cite as: http://hdl.handle.net/11858/00-001M-0000-0019-E635-2
We have investigated the effect of pressure and magnetic field on the specific heat of CeCu2Si2 and CeNi2Ge2, two undoped compounds close to an antiferromagnetic (afm) quantum critical point. In a CeCu2Si2 sample showing an afm phase at p = 0, application of a pressure of p = 0.7 GPa results in a replacement of this phase by superconductivity and to non-Fermi-liquid (NFL) behaviour in C/T. In CeNi2Ge2 the NFL behaviour present at p = 0 is suppressed by either a magnetic field B = 8 T or a pressure p = 1.3 GPa. For both compounds, the NFL effects are consistent (as T --> 0) with C/T = gamma(0) - alpha T-1/2 as expected when T-N --> 0.