Ultrasonic studies of superconducting phase diagram of UPt3
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We present a superconducting phase diagram of UPt3 for a field at 45 to the c-axis constructed from high-resolution ultrasonic velocity measurements. It is unambiguously determined that the HFL(T) line intersects the Hc2(T) line where a kink is observed. The available data favors the interpretation that the H(Tc*) line terminates on the HFL(T) line at a different point. 1994.