The motion of the high temperature front during combustion synthesis of ferrite materials generates residual magnetization in cylindrical product samples. The combustion wave created a current density of up to 10 A/cm2, which influenced the magnetization distribution. The measured peak magnetic field intensity was up to 8 mT. Qualitatively different magnetic field maps were generated in ferrite samples synthesized by different combustion modes. The average magnetization vector generated by either planar or pulsating combustion was oriented at a smaller angle with respect to the pellet axis ~f<45°! than those generated by spin combustion ~60°
Martirosyan, K. S., et al. “Spontaneous Magnetization Generated by Spin, Pulsating, and Planar Combustion Synthesis.” Journal of Applied Physics, vol. 93, no. 11, American Institute of Physics, May 2003, pp. 9329–35, doi:10.1063/1.1569997.
Journal of Applied Physics