Structural, chemical and low-temperature magnetic properties of lead-Free 0.6NiFe2O4-0.4Na0.5Bi0.5TiO3 magnetoelectric composite

We report on structural, chemical and low-temperature magnetic properties of lead-free 0.6NiFe(2)O(4)-0.4Na(0.5)Bi(0.5)TiO(3) composite. NiFe2O4 (NFO) and Na0.5Bi0.5TiO3 (NBTO) are seen to crystallize in inverse spinel and perovskite structure, respectively. 0.6NiFe(2) O-4-0.4Na(0.5)Bi(0.5)TiO(3) composite exhibits both NFO and NBTO phases in appropriate composition. Zero field-cooled (ZFC) and field-cooled (FC) magnetization measurements carried out from 15 to 300 K shows a large bifurcation at room temperature. ZFC and FC magnetization measurement exhibit a hump at T-m similar to 259.5 K, indicates the possible existence of competing magnetic interactions in 0.6NiFe(2) O-4-0.4Na(0.5)Bi(0.5)TiO(3) composite. Saturation magnetization, remnant magnetization and coercivity values are observed to increase with decreasing the temperature. Temperature-dependent saturation magnetization is fit to the Bloch's law. Magnetocrystalline anisotropy (K-1) value at various temperatures are estimated and is seen to increase from 0.23 9 10(4Y) erg/cc (at 300 K) to 0.34 9 10(4) erg/cc (at 15 K).

Automated summary

Structural, chemical, and low-temperature magnetic properties of lead-free 0.6NiFe(2)O(4)-0.4Na(0.5)Bi(0.5)TiO(3) composite are reported. The composite exhibits NFO and NBTO phases in appropriate composition, with ZFC and FC magnetization measurements showing competing magnetic interactions. Magnetization values increase with decreasing temperature, with saturation magnetization following Bloch's law and magnetocrystalline anisotropy increasing from 0.239 x 10(4) erg/cc to 0.349 x 10(4) erg/cc at various temperatures.