Thermal, magnetic and impedance properties of Li2M2+P2O7 (M2+=Fe and Ni) single crystals

Lithium-bearing iron and nickel pyrophosphate crystals were synthesized by hydrothermal techniques at relatively moderate P–T conditions. The XRD data revealed that both compounds were crystallized in a monoclinic system with respective cell parameters. Thermal behavior and structural coordination of the prepared materials were investigated using DTA/TGA and FTIR measurements, respectively. Magnetic results have revealed that these are frequency- and temperature-dependent prospective paramagnetic materials.