Magnetic phase diagram and crystal fields of superconducting ErNi2B2C |
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| Authors: | S Süllow B Ludoph C E Snel F E Kayzel E Brück G J Nieuwenhuys A A Menovsky J A Mydosh |
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| Institution: | (1) Kamerlingh Onnes Laboratory, Leiden University, 2300 RA Leiden, The Netherlands;(2) Van der Waals-Zeeman Laboratory, University of Amsterdam, 1018 XE Amsterdam, The Netherlands |
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| Abstract: | We have measured the specific heatc
p
in magnetic fields and the resistance of the antiferromagnetically ordered borocarbide superconductor ErNi2B2C. From our data we show that the superconductivity at 10.6 K coexists with antiferromagnetic order beginning at 5.8 K, and we determine the magneticB-T phase diagram. The specific heat in zero field gives additional information about the crystalline electric field (CEF) splitting. We show that the low-temperature specific heat is dominated by several low-lying CEF doublets with the first excited level at about 10 K, while the splitting of the next two levels is about 50 to 100 K. |
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| Keywords: | 74 70 Hk 75 40 Cx |
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