Abstract
Li0.5Fe1.0Rh1.504 has been studied by X-ray diffraction, Mossbauer spectroscopy. The crystal structure is characterized by the additional reflection (200) that is described by 1:1 ordered structure of Li, Fe at tetrahedral (A) site and can be assigned to the space group \( F\bar 43m \). The lattice constant (a 0) is 8.4348 A. The temperature dependence of the magnetic hyperfine field is analyzed by the Neel theory of ferrimagnetism. The inter-sublattice superexchange interaction is found to be antiferromagnetic with a strength of J A-B =-3.78 k B while the intra-sublattice superexchange interactions are ferromagnetic with strengths of J A-A =5.40 k B and J B-B =7.39 k B The Debye temperatures of the tetrahedral and octahedral sites are determined to be 388 and 464 ± 3 K, respectively, and the Neel temperature has been found to be 260 ± 3 K.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
