New ternary U-Pd-Al compound and its magnetic properties

Haga, Yoshinori   ; Matsuda, Tatsuma; Ikeda, Shugo; Nguyen, D.; Tateiwa, Naoyuki   ; Sakai, Hironori   ; Yamamoto, Etsuji  ; Onuki, Yoshichika*

Among the U-Pd-Al ternary phases, UPdAl is a well-known heavy fermion antiferromagnetic superconductor. We investigated this phase to find new compounds with novel physical properties. Using the Al-flux method, we found a new ternary compound with the hexagonal structure. From the EPMA and single crystal X-ray structural analyses, the composition was found approximately to beUPdAl. This is similar to the U-Fe-Si compound reported by Noguchi et al.