Microstructure and electromagnetic properties of Nd³⁺substitued Mg-Mn nanocrystalline ferrites via hydrothermal procedure

ABSTRACT

Mg_0.2Mn_0.8Nd_xFe_2-xO₄ (x = 0.000, 0.025, 0.050, 0.075 and 0.010) nano crystalline is synthesized via hydrothermal technique. Single cubic spinel phase is confirmed by XRD and the formation of Mg_0.2Mn_0.8Nd_xFe_2-xO₄ is verified by EDS. The average size of the nanoferrites is examined by TEM image. Nd³⁺ substituted Mg-Mn nanoferrites exhibit the low saturation magnetization (M_s) and high coercivity (H_c). The ferrite composites present that the resistivity and the magnetic loss are less than 2.8×10⁷ Ω·cm and 0.75 in the range of 2-18 GHz, respectively. The optimized Mg_0.2Mn_0.8Nd_xFe_2-xO₄ (x=0.050) showed the minimum reflection loss of -39.80 dB at 1.4 GHz and effective absorption bandwidth (lower than -10 dB) of 7.58 GHz with a thickness of only 3 mm. The high coercivity, resistivity and excellent wave absorption performance indicate that the addition of Nd³⁺ contributes to the synthesis of the excellent soft magnetic materials and wave absorbing materials.

KEYWORDS:

• Mg-Mn nanoferrites
• hydrothermal procedure
• magnetic properties
• dielectric properties

Disclosure statement

No potential conflict of interest was reported by the authors.