Study of the dielectric behavior of Co–Ni–Li nanoferrites

Frequency and temperature-dependence of dielectric permittivity and electric modulus studies of the solid solution Ca0.85Er0.1Ti1−xCo4x/3O3 (0 ≤ x ≤ 0.1)

“…12 the existence of one semicircle for x ¼ 0.00 and 0.05, indicating that the grain boundaries effect is more dominant than the grain effect in the conduction mechanism. 68,69 For x ¼ 0.10 the Cole-Cole plot shows the existence of two successive semi-circular peaks. The rst semicircle is attributed to the contribution of grain boundary (interfacial properties) and the second one is associated to the grain (bulk properties).…”

Properties of AlN thin film as dielectric for Au/Ti/n-Si device

“…(b) )[33,[47][48][49]. The value of τ is 3.18 𝜇𝑠 for 0.65 V and 1.59 𝜇𝑠 for 1.20 V. As seen experimental results, τ increases with increasing the voltage.…”

“…The dielectric relaxation time ( τ ) of the device is obtained by the relation τ =1/ω = 1 / 2π f. τ is obtained from the plot of 𝑀 ′′ − 𝑓 (Figure The 𝑀 ′′ vs. 𝑀 ′ (Cole-Cole) for the device at 300 K is indicated in Figure 10. The 𝑀 ′′ vs. 𝑀 ′ is more efficient than the 𝑍 ′′ vs. 𝑍 ′ in allocating the relaxation effects from grain boundaries (resistive plates) and grains (conducting regions) in dielectric materials [33,47]. As can be seen Fig.…”

Lattice strains and magnetic properties evolution of Ni doped rod-like cobalt–manganese ferrite

“…Various methods of synthesizing cobalt ferrite and doped cobalt ferrite with different magnetic properties have been developed, including solid-state reaction at low temperatures [8,13,14], co-precipitation method [9,15], ball milling method [16,17], hydrothermal treatment [18,19], sol-gel synthesis [20][21][22], ceramic method [23][24][25], microwave method [26,27], polyol method [28], citrate precursor method [29,30], and solvothermal method [31,32]. The magnetic properties of cobalt-based ferrites highly depend on the composition, synthesis method, and calcination temperature.…”