Pressure effects and specific heat in superconducting HoNi2B2C

S. A. Carter, B. Batlogg, R. J. Cava, J. J. Krajewski, W. F. Peck

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27 Scopus citations


We have studied the interaction of superconductivity (Tc=8.4 K) and magnetism (TN=5 K) in the HoNi2B2C system. Specific-heat measurements at 0 and 2 T indicate that the antiferromagnetic ground state involves a Ho 4f doublet, with the entropy shifting to higher temperatures, TTN, with increasing magnetic field. The heat-capacity anomaly at Tc, ΔC/Tc, is 10 (2) mJ/mole K2, similar to the values found for other borocarbide superconductors where the density of states at the Fermi level is comprised primarily of metal d states. Magnetic susceptibility and resistivity measurements under hydrostatic pressure P reveal that dTc/dP∼0.07 (0.04) K/kbar and dTN/dP∼0.25 (0.03) up to 7 kbar. These results reveal that the structure has an important influence on the superconducting and magnetic properties of HoNi2B2C.

Original languageEnglish (US)
Pages (from-to)12644-12648
Number of pages5
JournalPhysical Review B
Issue number18
StatePublished - 1995
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


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