Abstract
The temperature dependence of the electrical conductivity σ(T) of (Co41Fe39B20) x (Al–O)100–x of nanocomposite films for different concentrations x of amorphous ferromagnetic metal (56 > x > 30) has been studied in the temperature range of 4.2–300 K. It has been shown that, for concentrations in the interval 56 > x > 49, the conductivity obeys the logarithmic law σ(T) = A(1 + αlnT), where A and α depend on the concentration. According to the theory developed by Efetov et al., this logarithmic dependence is connected with specificities of the Coulomb interaction in nanogranulated alloys on the intergranule tunneling in the transient region of concentrations from metallic conduction to the dielectric regime. The comparison of the theory with the experiment has revealed only qualitative agreement. The reasons of the quantitative disagreement have been discussed. The resistivity of samples with the concentrations lying in the range 49 > x > 30 obeys the 1/2 power law.
Similar content being viewed by others
References
K. B. Efetov and A. Tschersich, Phys. Rev. B: Condens. Matter 67, 174205 (2003).
I. S. Beloborodov, A. V. Lopatin, V. M. Vinokur, and K. B. Efetov, Rev. Mod. Phys. 79, 469 (2007).
J. C. Denardin, M. Knobel, X. X. Zhang, and A. B. Pakhomov, J. Magn. Magn. Mater. 262, 15 (2003).
A. Gerber, A. Milner, G. Deutscher, M. Karpovsky, and A. Gladkikh, Phys. Rev. Lett. 78, 4277 (1997).
D. Bartov, A. Segal, M. Karpovski, and A. Gerber, Phys. Rev. B: Condens. Matter 90, 144423 (2014).
Yu. E. Kalinin, A. N. Remizov, and A. V. Sitnikov, Phys. Solid State 46 (11), 2146 (2004).
S. A. Gridnev, Yu. E. Kalinin, and A. V. Sitnikov, Nonlinear Phenomena in Nano- and Microheterogeneous Systems (BINOM, Moscow, 2012) [in Russian].
M. G. del Muro, Z. Konstantinovie, X. Battle, and A. Labarto, J. Phys. D: Appl. Phys. 46, 495304 (2013).
M. A. Pankov, B. A. Aronzon, V. V. Rylkov. A. V. Davydov, V. V. Tugushev, S. Caprara, L. A. Likhachev, E.M. Pashaev, M. A. Chuev, E. Lähderanta, A. S. Vedeneev, and A. S. Bugaev, Eur. Phys. J. B 85, 206 (2012).
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © Yu.O. Mikhailovskii, V.N. Prudnikov, V.V. Ryl’kov, K.Yu. Chernoglazov, A.V. Sitnikov, Yu.E. Kalinin, A.B. Granovskii, 2016, published in Fizika Tverdogo Tela, 2016, Vol. 58, No. 3, pp. 433–435.
Rights and permissions
About this article
Cite this article
Mikhailovskii, Y.O., Prudnikov, V.N., Ryl’kov, V.V. et al. Logarithmic temperature dependence of electrical resistivity of (Co41Fe39B20) x (Al–O)100 – x nanocomposites. Phys. Solid State 58, 444–446 (2016). https://doi.org/10.1134/S1063783416030227
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1063783416030227