Peculiarities of the microwave properties of hard-soft functional composites SrTb0.01Tm0.01Fe11.98O19-AFe2O4 (A = Co, Ni, Zn, Cu, or Mn)

A V Trukhanov; N A Algarou; Y Slimani; M A Almessiere; A Baykal; D I Tishkevich; D A Vinnik; M G Vakhitov; D S Klygach; M V Silibin; T I Zubar; S V Trukhanov

doi:10.1039/d0ra05087c

Peculiarities of the microwave properties of hard-soft functional composites SrTb_0.01Tm_0.01Fe_11.98O₁₉-AFe₂O₄ (A = Co, Ni, Zn, Cu, or Mn)

RSC Adv. 2020 Sep 3;10(54):32638-32651. doi: 10.1039/d0ra05087c. eCollection 2020 Sep 1.

Authors

A V Trukhanov^{1

2}, N A Algarou^{3

4}, Y Slimani³, M A Almessiere³, A Baykal⁵, D I Tishkevich^{1

2}, D A Vinnik², M G Vakhitov^{2

6}, D S Klygach^{2

6}, M V Silibin^{7

8

9}, T I Zubar^{1

2}, S V Trukhanov^{1

2}

Affiliations

¹ SSPA "Scientific and Practical Materials Research Centre of NAS of Belarus" Minsk 220072 Belarus truhanov86@mail.ru.
² South Ural State University Chelyabinsk 454080 Russia.
³ Department of Biophysics, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University P.O. Box 1982 31441 Dammam Saudi Arabia.
⁴ Department of Physics, College of Science, Imam Abdulrahman Bin Faisal University P.O. Box 1982 Dammam 31441 Saudi Arabia.
⁵ Department of Nanomedicine Research, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University P.O. Box 1982 31441 Dammam Saudi Arabia.
⁶ Ural Federal University Ekaterinburg 620002 Russia.
⁷ Institute of Advanced Materials and Technologies, National Research University of Electronic Technology "MIET" 124498 Zelenograd Moscow Russia.
⁸ Institute for Bionic Technologies and Engineering, I.M. Sechenov First Moscow State Medical University Moscow 119991 Russia.
⁹ Scientific-Manufacturing Complex "Technological Centre" 124498 Zelenograd Moscow Russia.

Abstract

Herein, we investigated the correlation between the chemical composition, microstructure, and microwave properties of composites based on lightly Tb/Tm-doped Sr-hexaferrites (SrTb_0.01Tm_0.01Fe_11.98O₁₉) and spinel ferrites (AFe₂O₄, A = Co, Ni, Zn, Cu, or Mn), which were fabricated by a one-pot citrate sol-gel method. Powder XRD patterns of products confirmed the presence of pure hexaferrite and spinel phases. Microstructural analysis was performed based on SEM images. The average grain size for each phase in the prepared composites was calculated. Comprehensive investigations of dielectric properties (real (ε') and imaginary parts (ε'') of permittivity, dielectric loss tangent (tan(δ)), and AC conductivity) were performed in the 1-3 × 10⁶ Hz frequency range at 20-120 °C. Frequency dependency of microwave properties were investigated using the coaxial method in frequency range of 2-18 GHz. The non-linear behavior of the main microwave properties with a change in composition may be due to the influence of the soft magnetic phase. It was found that Mn- and Ni-spinel ferrites achieved the strongest electromagnetic absorption. This may be due to differences in the structures of the electron shell and the radii of the A-site ions in the spinel phase. It was discovered that the ionic polarization transformed into the dipole polarization.