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arXiv · 1204.6355

Nearly itinerant ferromagnetism in CaNi2 and CaNi3

A. Jesche·K. W. Dennis·A. Kreyssig·P. C. Canfield
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Abstract

Single crystals of CaNi2 and CaNi3 were successfully grown out of excess Ca. Both compounds manifest a metallic ground state with enhanced, temperature dependent magnetic susceptibility. The relatively high Stoner factors of Z = 0.79 and Z = 0.87 found for CaNi2 and CaNi3, respectively, reveal their close vicinity to ferromagnetic instabilities. The pronounced field dependence of the magnetic susceptibility of CaNi3 at low temperatures (T < 25 K) suggests strong ferromagnetic fluctuations. A corresponding contribution to the specific heat with a temperature dependence of T^3lnT was also observed.

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A. Jesche, K. W. Dennis, A. Kreyssig, P. C. Canfield. 2012-04-28. Nearly itinerant ferromagnetism in CaNi2 and CaNi3. https://doi.org/10.1103/physrevb.85.224432

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