AC Conductivity, Dieedric Loss, And Dielectric Constant

1345 Words 6 Pages
Electrical Properties
AC Conductivity, Ac Resistivity, Dielectric loss, and Dielectric constant are electrical properties and measured as a function of frequency. AC Conductivity and Resistivity
AC resistance (ρac) was recorded by LCR meter model 4275 in the frequency range 1MHz to 3GHz. AC conductivity was determined by using the value of Ac resistance. As we know, Ac Conductivity is reciprocal of Ac resistance can be calculated by the relation;
ac =1/ρac (6)
The variation of AC electrical conductivity in high frequency range 1MHz-3GHz for all the samples is plotted as shown in figure 3. From the figure it is shown that the AC conductivity of all given samples is increased with the rise in frequency. It can be seen from the figure that at low frequency there is little or no frequency dependence while for higher frequencies ac conductivity increases linearly with frequency. The ac conductivity (ac) of the ferrite samples
…show more content…
The M-H loops for samples Ba0.75Ca0.25PrxFe12-xO19 with different concentration of Pr (x=0.0, 0.5, 1.0, 1.5, 2.0) have been represented in Fig 4. The measured values of saturation magnetization ‘Ms’, remanence ‘Mr’ and coercivity ‘Hc’ are listed in Table 2. The measured values of saturation magnetization ‘Ms’ for all the samples were observed in the range of (60.12-65.14) emu/g and observed values of remanence ‘Mr’ were in the range of (39.31-46.80) emu/g. The Mr/Ms ratio for all the samples were also calculated which is known as squareness ratio. The materials having high value of coercivity show the hard magnetic materials and this behavior was observed in M-type hexa ferrites [36]. The measured values of coercivity ‘Hc’ for all the samples were observed in the range of (1.38-2.06) KOe. All the samples have high value of coercivity showing the hard magnetic behavior of M-type hexa

Related Documents