Abstract
To investigate the magnetic ground state coexisting with superconductivity (Tc=2.5 K) in Heusler compound ybpd2Sn, we have measured the specific heat C in magnetic fields. In zero field, above the antiferromagnetic (AF) transition temperature TN=0.22 K, tail in C is observed indicating a short-range AF correlation. This could be the origin of the anomalous temperature dependence of the upper critical field Bc2.Using a peak in C(T) observed for B>0.3 T, we confirmed that the crystalline-field ground state of Yb3+ is г7 doublet. The broad peak-shape caused by a internal-field fluctuation at the Yb-ions indicates that the short-range correlation is not destroyed even in higher fields.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
