title: New heavy-fermion antiferromagnet UPd2Cd20.
abstract: We succeeded in growing a new high quality single crystal of a ternary uranium compound UPd2Cd20. From the electrical resistivity, magnetization, magnetic susceptibility, and specific heat experiments, UPd2Cd20 is found to be an antiferromagnetic heavy-fermion compound with the Néel temperature [Formula: see text]  =  5 K and exhibits the large electronic specific heat coefficient γ exceeding 500 mJ (K(2)· mol)(-1). This compound is the first one that exhibits the magnetic ordering with the magnetic moments of the U atom in a series of UT2X20 (T: transition metal, X  =  Al, Zn, Cd). UPd2Cd20 shows typical characteristic features in heavy-fermion systems such as a broad maximum in the magnetic susceptibility at [Formula: see text] and a large coefficient A of T (2) term in the resistivity.
authors.affiliation: Department of Physics, Niigata University, Niigata 950-2181, Japan.
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Hirose
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Doto
authors.forename: Fuminori
authors.initials: F
authors.lastname: Honda
authors.forename: Dexin
authors.initials: D
authors.lastname: Li
authors.forename: Dai
authors.initials: D
authors.lastname: Aoki
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Haga
authors.forename: Rikio
authors.initials: R
authors.lastname: Settai