Mn2+ Doped Mg–Zn Ferrite Nanoparticles for Microwave Device Applications

We report the frequency- and temperature-dependent dielectric behavior of Mn
²⁺
doped Mg
_0.5
Zn
_0.5-x
Mn
_x
Fe
₂
O
₄
(x = 0.125, 0.250, 0.375, 0.500) nanoferrites synthesized using co-precipitation route. Dielectric constant decreases sharply at low frequencies in comparison tohigher frequencies. Loss tangent has been observed to be small for all samples. The temperature-dependent dielectric study for prepared samples showsdielectric relaxation at higher temperatures (531-667 K). This has been attributed to the dipolar and interfacial polarization. Low values of losstangent of investigated nanoferrites make them potential candidates for microwave device applications.