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. 2014 Jul 22;5:4417. doi: 10.1038/ncomms5417

Figure 2. Dielectric properties of the FeCo-MgF nanogranular films.

Figure 2

(a) Dielectric constant at 1 kHz (ε′1k) measured using an LCR meter vs the composition ratio of Fe+Co in FeCo-MgF films. The value of ε′1k is 5.6 at 0 at.%, and increases with increasing Fe+Co content, attaining 490 at 30 at.%. (b) Dielectric constant ε′ vs frequency f of FeCo-MgF films for Fe+Co=14, 17, 21, and 29 at.% measured in the frequency range of 1 kHz–1 MHz. The red dots represent the experimental results, and the blue solid lines represent the theoretical results obtained from calculations based on the spin-dependent dielectric relaxation model calculations (see formula (15)).