Investigation of ferromagnetic resonance heating of isotropic superparamagnetic on the example of biogenic ferrihydrite nanoparticles

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Abstract

Ferrihydrite nanoparticles have been synthesized and characterized. The dependences of the temperature increment of powders in the pumping mode by a high-frequency electromagnetic field in a constant magnetic field are studied. It is shown that the experimental dependence of the particle temperature on the dc magnetic field strength is in good agreement with the theory of ferromagnetic resonance for an isotropic superparamagnetic.

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About the authors

S. V. Stolyar

Federal Research Center Krasnoyarsk Scientific Centre of the Siberian Branch of the Russian Academy of Sciences; Siberian Federal University

Author for correspondence.
Email: stol@iph.krasn.ru
Russian Federation, Krasnoyarsk, 660036; Krasnoyarsk, 660041

O. A. Li

Federal Research Center Krasnoyarsk Scientific Centre of the Siberian Branch of the Russian Academy of Sciences; Siberian Federal University

Email: stol@iph.krasn.ru
Russian Federation, Krasnoyarsk, 660036; Krasnoyarsk, 660041

A. M. Vorotynov

Kirensky Institute of Physics, Federal Research Center Krasnoyarsk Scientific Centre of the Siberian Branch of the Russian Academy of Sciences

Email: stol@iph.krasn.ru
Russian Federation, Krasnoyarsk, 660036

D. A. Velikanov

Federal Research Center Krasnoyarsk Scientific Centre of the Siberian Branch of the Russian Academy of Sciences; Kirensky Institute of Physics, Federal Research Center Krasnoyarsk Scientific Centre of the Siberian Branch of the Russian Academy of Sciences

Email: stol@iph.krasn.ru
Russian Federation, Krasnoyarsk, 660036; Krasnoyarsk, 660036

N. G. Maksimov

Federal Research Center Krasnoyarsk Scientific Centre of the Siberian Branch of the Russian Academy of Sciences

Email: stol@iph.krasn.ru
Russian Federation, Krasnoyarsk, 660036

R. S. Iskhakov

Kirensky Institute of Physics, Federal Research Center Krasnoyarsk Scientific Centre of the Siberian Branch of the Russian Academy of Sciences

Email: stol@iph.krasn.ru
Russian Federation, Krasnoyarsk, 660036

V. P. Ladygina

Federal Research Center Krasnoyarsk Scientific Centre of the Siberian Branch of the Russian Academy of Sciences

Email: stol@iph.krasn.ru
Russian Federation, Krasnoyarsk, 660036

A. O. Shokhrina

Federal Research Center Krasnoyarsk Scientific Centre of the Siberian Branch of the Russian Academy of Sciences; Siberian Federal University

Email: stol@iph.krasn.ru
Russian Federation, Krasnoyarsk, 660036; Krasnoyarsk, 660041

References

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2. Fig. 1. Micrograph of ferrihydrite particles (a), M(H) dependence recorded at room temperature (b).

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3. Fig. 2. Temperature dependences of the resonance field Hres and line width ΔH (a); change in the temperature of ferrihydrite powders under microwave pumping in a constant field of strength (b): 1 – H=0, 2 – H=1 kOe, 3 – H=4 kOe, 4 – H=3.3 kOe; dependence of the maximum value of the temperature increment on the square of the microwave amplitude (c); approximation of the dependence of the maximum heating on the magnitude of the constant field (d), and experimental points.

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