The basic approaches to increasing the efficiency of broadband radio-absorbing nickel-zinc ferrites are developed. Requirements to their microstructure have been elaborated to provide for the occurrence of domain walls resonance at low frequencies (5—100 MHz). The effect of alloying additives on the absorption of electromagnetic waves is studied. The formation efficiency of coarse-grained structure with grain-boundary interlayers having high dielectric permeability is confirmed. It is established that the absorbing properties of ferrites raise with a reduction of the electric resistance of the grains if the dielectric properties of the boundaries are preserved.

1. Smit, YA. Ferrity. Fizicheskie svoystva i prakticheskoe primenenie. / YA. Smit, KH. Veyn − M. : Izd−vo inostrannoy literatury, 1962. − 504 s.
2. Pokusin, D. N. Kompleksnaya magnitnaya pronitsaemost' ferritov v oblasti estestvennogo ferromagnitnogo rezonansa / D. N. Pokusin, E. A. CHukhlebov, M. YU. Zalesskiy // Radiotekhnika i elektronika. − 1991. − T. 36, № 11. − S. 2085—2091.
3. Rankis, G. ZH. Dinamika namagnichivaniya polikristallicheskikh ferritov / G. ZH. Rankis − Riga : Zinatne, 1981. − 186 s.
4. Gurevich, A. G. Magnitnye kolebaniya i volny / A. G. Gurevich, G. A. Melkov − M. : Nauka, 1994. − 464 s.
5. Gorelik, S. S. Formirovanie mikrostruktury i svoystv ferritov v protsesse rekristallizatsii / S. S. Gorelik, E. A. Babich, L. M. Letyuk − M. : Metallurgiya, 1984. − 112 c.
6. Andreev, V. G. Perspektivnye radiopogloshchayushchie materialy na osnove nanostrukturnykh Ni—Zn−ferritov / V. G. Andreev, V. G. Kostishin, R. M. Vergazov, A. T. Morchenko, S. V. Podgornaya, D. N. CHitanov, I. I. Kaneva, D. G. Krutogin, V. R. Mayorov, A. V. Pankratov // Tez. ob"edinennoy konf. «XIV Natsional'naya konferentsiya po rostu kristallov» i «Kristallofizika XXI veka» − M. : Institut kristallografii RAN, RNTS «Kurchatovskiy institut», 2010.