Rare Earth-Transition Metal Indides with Lu5Ni2In4-type Structure
2014
Zaremba, Roman | Hermes, Wilfried | Eul, Matthias | Pöttgen, Rainer
New intermetallic compounds RE₅T₂In₄ (RE = Sc, Y, La-Nd, Sm, Gd-Tm, Lu; T = Rh, Ir) were synthesized by arc-melting of the elements or by induction melting of the elements in tantalum crucibles under flowing argon. The samples were characterized by X-ray powder diffraction. They crystallize with the orthorhombic Lu₅Ni₂In₄-type structure, space group Pbam, Z = 2, a 2 : 1 intergrowth variant of CsCl and AlB₂ related slabs of compositions InRE₈ (distorted cubes) and RhRE₆ (distorted trigonal prisms). Susceptibility measurements of Ce₅Ir₂In₄ have revealed modified Curie- Weiss behavior above 70 K with an experimental magnetic moment of 2.45(1) μB / Ce atom. The cerium magnetic moments order ferri- or ferromagnetically at TC = 7.1(2) K.
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