• Schnelle, W.
• Schneidewind, A.
• Ouladdiaf, B.
• Stockert, O.
• Ruck, Michael
• Mills, A. M.

Abstract

<p>Magnetic susceptibility measurements and neutron powder diffraction were performed on the rare-earth transition-metal sulfide Ce₂ Fe₂ S₅ to study the effect of the substitution of nonmagnetic La^{3 +}(4 f⁰) by Ce^{3 +}4 f¹) . Ce₂ Fe₂ S₅, which is isostructural to La₂ Fe₂ S₅, contains Fe^{2 +} ions within chains of iron-sulfur octahedra and tetrahedra that are interconnected by Ce^{2 +} ions. Two antiferromagnetic phases, both with the propagation vector τ = (frac(1, 2) frac(1, 2) 0), are observed: at 5 K ≤ T ≤ 80 K ordering of the Fe^{2 +} moments is found; at T ≤ 5 K the Ce^{3 +} ions also participate in the magnetic ordering.</p>

Topics

• impedance spectroscopy
• phase
• iron
• susceptibility