Stolyar S. V.
1,2, Vazhenina I. G.
1, Shokhrina A. O.
1,2, Nikolaeva E. D.
1, Boev N. M.
3,2, Li O. A.
1,2, Iskhakov R. S.
3,4, Vorotynov A. M.
3, Velikanov D. A.
3, Volochaev M. N.
3, Vasiliev A. D.
31Krasnoyarsk Scientific Center of the Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, Russia
2Siberian Federal University, Krasnoyarsk, Russia
3Kirensky Institute of Physics, Federal Research Center KSC SB, Russian Academy of Sciences, Krasnoyarsk, Russia
4Samarkand State University named after Sharof Rashidov, Samarkand, Uzbekistan
Email: stol@iph.krasn.ru, irina-vazhenina@mail.ru, annashohrina152@gmail.com, nikolaeva-lena@mail.ru, boev@iph.krasn.ru, oali@sfu-kras.ru, rauf@iph.krasn.ru, sasa@iph.krasn.ru, dpona1@gmail.com, volochaev91@mail.ru
γ-Fe2O3 and CoFe2O4 nanopowders were prepared by the chemical precipitation method. Magnetization curves, ferromagnetic resonance curves, and dependences of the temperature of the powders on time were measured during the absorption of microwave field energy at a frequency of 8.9 GHz at different values of the magnetic field strength. It was found that the greatest temperature increment of cobalt ferrite powders is achieved in the absence of an applied constant magnetic field - at natural ferromagnetic resonance. The frequencies of natural ferromagnetic resonance of the prepared powders were determined. Heating of magnetic nanoparticles in the field of their magnetic anisotropy (natural ferromagnetic resonance) can find application in biomedicine. Keywords: magnetic nanoparticles, ferromagnetic resonance, natural ferromagnetic resonance.
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