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Heat capacity of CeCu2Si2 under hydrostatic pressure
2006
We present low temperature (0.4Kheavy-fermion compound CeCu 2 Si 2 . At ambient pressure, our A/S type single crystal orders antiferromagnetically (AFM) at T N ≈ 0.7 K and superconducts below a slightly lower temperature T c ≈ 0.5 K. Application of only a small pressure (p ≈ 0.1 GPa) suppresses the long-range AFM order and rapidly shifts the superconducting transition temperature to T c ≈ 0.62 K. Upon further increasing pressure T c (p) reveals a shallow minimum at p ≈ 1.6 GPa from where it starts to increase again, indicating the entrance into the high-pressure superconducting region.
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