Antiferromagnetic properties of the intermetallics Ce3Ni2X7 (X=Ge or Sn)
Abstract
Electrical resistivity and magnetization measurements have been performed on the isotypic compounds Ce
3
Ni
2
Ge
7
and Ce
3
Ni
2
Sn
7
. The ternary germanide orders antiferromagnetically below T
N
=7.0(2) K, a Néel temperature higher than that observed for Ce
3
Ni
2
Sn
7
[T
N
=3.8(2) K]. This investigation allows proposal of a direct relationship between the Ce valence and the smallest interatomic distances d
Ce-Ni
and d
Ce-Sn
for the ternary stannides existing in the Ce-Ni-Sn system.
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