Abstract
The coefficient of reflection of microwave radiation from a plane layer of a magnetic fluid magnetized in a field of 11.5 Oe is measured in a frequency range of 24 MHz in temperature intervals 293–333 K; the volume concentration of the magnetic phase (magnetite) is 15 vol %. In this range, the dynamic susceptibility of nanoparticles exhibits strong dispersion (ferromagnetic resonance). The experimental results are interpreted on the basis of the theory of high-frequency magnetization for an ensemble of noninteracting isotropic super-paramagnetic particles. It is found that this simple model provides a satisfactory description of the temperature and frequency dependences of the reflection coefficient.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Yu. L. Raĭkher and M. I. Shliomis, Zh. Éksp. Teor. Fiz. 67, 1060 (1974) [Sov. Phys. JETP 40, 526 (1974)].
R. S. Gekht, V. A. Ignatchenko, Yu. L. Raĭkher, and M. I. Shliomis, Zh. Éksp. Teor. Fiz. 70, 1300 (1976) [Sov. Phys. JETP 43, 677 (1976)].
P. C. Fannin, B. K. P. Scaife, and S. W. Charles, J. Magn. Magn. Mater. 72, 95 (1988).
P. C. Fannin, S. W. Charles, and T. Relihan, Mater. Sci. Technol. 4, 1160 (1993).
P. C. Fannin and S. W. Charles, J. Phys. D: Appl. Phys. 24, 76 (1991).
P. C. Fannin, T. Relihan, and S. W. Charles, J. Phys. D: Appl. Phys. 28, 2003 (1995).
D. A. Usanov, A. V. Skripal, and S. A. Ermolaev, Pis’ma Zh. Tekh. Fiz. 19(16), 47 (1992) [Sov. Tech. Phys. Lett. 19, 520 (1992)].
D. A. Usanov, Al. V. Skripal, An. V. Skripal, and A. V. Kurganov, in Proceedings of the 9th International Plyos Conference on Magnetic Fluids, IPCMF-2000, Plyos, Russia, 2000, pp. 121–125.
D. A. Usanov, Al. V. Skripal, An. V. Skripal, and A. V. Kurganov, Zh. Tekh. Fiz. 71(12), 26 (2001) [Tech. Phys. 46, 1514 (2001)].
Y. L. Raikher and V. I. Stepanov, Phys. Rev. B 50, 6250 (1994).
Y. L. Raikher and V. I. Stepanov, Phys. Rev. B 51, 16428 (1995).
I. V. Lebedev, Microwave Devices and Technology (Vysshaya Shkola, Moscow, 1970), Vol. 1 [in Russian].
Author information
Authors and Affiliations
Additional information
Original Russian Text © D.A. Usanov, Al.V. Skripal, An.V. Skripal, A.E. Postel’ga, Yu.L. Raikher, V.I. Stepanov, 2006, published in Zhurnal Tekhnicheskoĭ Fiziki, 2006, Vol. 76, No. 11, pp. 126–129.
Rights and permissions
About this article
Cite this article
Usanov, D.A., Skripal, A.V., Skripal, A.V. et al. Temperature dependence of the coefficient of reflection of microwave radiation from a magnetic fluid layer. Tech. Phys. 51, 1520–1523 (2006). https://doi.org/10.1134/S1063784206110211
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1134/S1063784206110211