title: A new Kondo antiferromagnet Ce(Ni(0.25)In(1.75)).
abstract: We find that Ce(Ni(0.25)In(1.75)) crystallizes in the hexagonal AlB(2)-type structure with lattice parameters a = 0.4850(5) nm and c = 0.3908(5) nm. Magnetic susceptibility, electrical resistivity and low-temperature specific heat data reveal that the bulk phase transition at 3.7 ± 0.2 K in Ce(Ni(0.25)In(1.75)) is to an antiferromagnetic state. The magnetic contribution to the resistivity ρ(mag) of Ce(Ni(0.25)In(1.75)) increases as ln(T) when temperature is lowered from room temperature and reaches a plateau at 9 K, followed by a rapid decrease around 4 K. These results associated with a reduction of the Ce magnetic moment and of the magnetic entropy at T(N) suggest that Ce(Ni(0.25)In(1.75)) could be a Kondo antiferromagnet. The Kondo temperature is estimated to be of order 6 K.
authors.affiliation: Department of Physics, National Chung Cheng University, Ming-Hsiung, Chia-Yi 621, Taiwan, Republic of China.
authors.forename: H H
authors.initials: HH
authors.lastname: Sung
authors.forename: H H
authors.initials: HH
authors.lastname: Wu
authors.forename: K J
authors.initials: KJ
authors.lastname: Syu
authors.forename: W H
authors.initials: WH
authors.lastname: Lee
authors.forename: Y Y
authors.initials: YY
authors.lastname: Chen