Detailed heat capacity measurements of the ternary compounds ErRh4B4 and LuRh4B4 have been performed between 0.5 and 36 K and in magnetic fields up to 4 kG, yielding new information on crystal field effects in these materials and on the influence of externally applied magnetic fields on the coupled superconducting-ferromagnetic reentrant transition in ErRh4B4. Static magnetic susceptibility data on LuRh4B4 are presented which allow qualitative conclusions to be drawn regarding the magnitude of exchange enhancement and orbital paramagnetic effects in the RERh4B4 compounds. The electrical resistivity of ErRh4B4 has also been determined between 4 K and room temperature.
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This research was supported by the Department of Energy under Contract Number Ey-76-S-03-0034-PA227-3 (LDW, HBM, RWM, MBM) and by the National Science Foundation under Grant Number NSF/DMR77-08469 (DCJ). One of us (RWM) thanks the National Science Foundation for a postdoctoral fellowship.
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Woolf, L.D., Johnston, D.C., MacKay, H.B. et al. Superconducting and normal state properties of ErRh4B4 and LuRh4B4 . J Low Temp Phys 35, 651–669 (1979). https://doi.org/10.1007/BF00117903
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DOI: https://doi.org/10.1007/BF00117903