Effect of Magnetic Anisotropy on Magnetic Thermal Induction of Mn_0.3Zn_0.3Co_xFe_2.4-xO_4 Nanoparticles

Mn_0.3Zn_0.3Co_xFe_2.4-xO_4 series magnetic nanoparticles are prepared by the high-temperature organic solvent method, and Mn_0.3Zn_0.3Co_xFe_2.4-xO_4@SiO_2 composite nanoparticles are prepared by the reverse microemulsion method. The as-prepared samples are characterized, and the results show that the magnetic anisotropy constant of nanoparticles increases with the cobalt content, and the magnetic thermal induction shows a trend of increasing first and then decreasing. The optimal magnetic thermal induction is obtained at x=0.12 with a specific loss power of 2086 w/g_\rm metal, which is a bright prospect in clinical magnetic hyperthermia.