Magnetic Studies on New Mixed-Valence Phosphates Zn2+Fe23+(P2O7)2 and Zn0.52+Cu0.52+Fe23+(P2O7)2


Lamsaf H., Oulmekki A., Elghadraoui E. H., Fausto R., Wagner F. E., Costa B. F. O.

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM, cilt.32, sa.5, ss.1377-1382, 2019 (SCI-Expanded) identifier identifier

Özet

Structural studies of Zn(2+)Fe23+(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 T-N =5.6 (1), Zn(2+)Fe23+(P2O7)(2) becomes antiferromagnetic and the T-N =14 K is attributed to Cu0.5Zn0.5Fe2(P2O7)(2). Mossbauer studies at room temperature and low temperature were performed in both samples.