ChemInform Abstract: Mn(III) Containing Ferrites in the System Li_0.5Fe_2.5‐xMn_xO₄.

Abstract

Mn(III) Containing Ferrites in the SystemLi 0.5 Fe 2.5−x MnxO 4 . -The title system with cubic spinel structure is obtained by thermal decomposition of freeze-dried Li-Mn(II)-Fe(III)-formates at temperatures of 700 • C for samples with x = 0.5 and 1.0 and 900 • C for the sample with x = 1.5 (under air). These ferrites contain Mn(III) ions at octahedral sites of th spinel lattice. The Li ions occupy both the octahedral and tetrahedra cationic positions of the spinel lattice. The saturation magnetic moment of the samples increases and the Curie temp. decreases with increasing Mn content. -(BONSDORF, G.; SCHAEFFER, K.; LANGBEIN, H.; Eur.

Direct and facile synthesis of Li–Sr–Zn ferrites via low temperature solution combustion route

“…The conventional ceramic method which includes preparation of ferrites at high temperature results in loss of fine particle nature. Owing to the importance of nanocrystalline ferrites and technological importance of lithium ferrite, Li 0.5 Fe 2.5 O 4 , a well-known ferrimagnetic compound in which trivalent Fe 3 þ ions are distributed both in tetrahedral (A) and octahedral (B sites) sites, ((Fe 1.0 ) A [Li 0.5 -Fe 1.5 ] B O 4 ), of spinel-related structure [16]. Here, the intersublattice interactions are antiferromagnetic while the intrasublattice interactions are ferromagnetic, and super-exchange interactions are reason for magnetic order.…”