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Magnetic Studies on New Mixed-Valence Phosphates Zn2+Fe23+(P2O7)(2) and Zn0.52+Cu0.52+Fe23+(P2O7)(2)
Authors: Lamsaf, H; Oulmekki, A; Elghadraoui, EH; Fausto, R; Wagner, FE; Costa, BFO
Ref.: J. Supercon. Nov. Magn. 32(5), 1377-1382 (2019)
Abstract: Structural studies of Zn2+Fe3+2(P2O7)2 and Cu0.5Zn0.5Fe2(P2O7)2 were made using powder X-ray diffraction and refined by Rietveld method. Both phosphates crystallize in an orthorhombic structure with Pnma space group. Magnetometry measurements showed that below TN = 5.6 (1), Zn2+Fe3+2(P2O7)2 becomes antiferromagnetic and the TN = 14 K is attributed to Cu0.5Zn0.5Fe2(P2O7)2. Mossbauer studies at room temperature and low temperature were performed in both samples.
