TY  - JOUR
AU  - Fedotova, J. A.
AU  - Przewoznik, J.
AU  - Kapusta, Cz
AU  - Milosavljević, Momir
AU  - Kasiuk, J. V.
AU  - Zukrowski, J.
AU  - Sikora, M.
AU  - Maximenko, A. A.
AU  - Szepietowska, D.
AU  - Homewood, Kevin P.
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4609
AB  - Temperature and magnetic field dependences of electrical conductivity are systematically studied in granular films (Fe45Co45Zr10)(x)(Al2O3)(100-x) (28 LT = x LT = 64) containing crystalline metallic alpha-FeCo-based nanoalloy cores encapsulated in an amorphous oxide shell embedded in an amorphous Al2O3 matrix. Formation of metallic core-oxide shell nanogranules is confirmed by transmission electron microscopy (TEM) and HRTEM. The structure of core and shell is governed with the difference in the oxidation states of Fe and Co ions investigated with EXAFS, XANES and Mossbauer spectroscopy. A considerable negative magnetoresistance (MR) effect of spin-dependent nature is observed in the whole range of x values. Its increase with decreasing temperature is correlated with the magnetic saturation of superparamagnetic metallic nanogranules. The enhanced MR effect in core-shell granular films is related to the percolation of oxide shells and their influence through spin filtering processes. A considerable high field MR at low temperatures and the resulting deviation of MR and squared magnetization are attributed to a magnetic randomness and/or strong magnetic anisotropy of the magnetic oxide shell.
T2  - Journal of Physics. D: Applied Physics
T1  - Magnetoresistance in FeCoZr-Al2O3 nanocomposite films containing metal core-oxide shell nanogranules
VL  - 44
IS  - 49
DO  - 10.1088/0022-3727/44/49/495001
ER  - 

@article{
author = "Fedotova, J. A. and Przewoznik, J. and Kapusta, Cz and Milosavljević, Momir and Kasiuk, J. V. and Zukrowski, J. and Sikora, M. and Maximenko, A. A. and Szepietowska, D. and Homewood, Kevin P.",
year = "2011",
abstract = "Temperature and magnetic field dependences of electrical conductivity are systematically studied in granular films (Fe45Co45Zr10)(x)(Al2O3)(100-x) (28 LT = x LT = 64) containing crystalline metallic alpha-FeCo-based nanoalloy cores encapsulated in an amorphous oxide shell embedded in an amorphous Al2O3 matrix. Formation of metallic core-oxide shell nanogranules is confirmed by transmission electron microscopy (TEM) and HRTEM. The structure of core and shell is governed with the difference in the oxidation states of Fe and Co ions investigated with EXAFS, XANES and Mossbauer spectroscopy. A considerable negative magnetoresistance (MR) effect of spin-dependent nature is observed in the whole range of x values. Its increase with decreasing temperature is correlated with the magnetic saturation of superparamagnetic metallic nanogranules. The enhanced MR effect in core-shell granular films is related to the percolation of oxide shells and their influence through spin filtering processes. A considerable high field MR at low temperatures and the resulting deviation of MR and squared magnetization are attributed to a magnetic randomness and/or strong magnetic anisotropy of the magnetic oxide shell.",
journal = "Journal of Physics. D: Applied Physics",
title = "Magnetoresistance in FeCoZr-Al2O3 nanocomposite films containing metal core-oxide shell nanogranules",
volume = "44",
number = "49",
doi = "10.1088/0022-3727/44/49/495001"
}

Fedotova, J. A., Przewoznik, J., Kapusta, C., Milosavljević, M., Kasiuk, J. V., Zukrowski, J., Sikora, M., Maximenko, A. A., Szepietowska, D.,& Homewood, K. P.. (2011). Magnetoresistance in FeCoZr-Al2O3 nanocomposite films containing metal core-oxide shell nanogranules. in Journal of Physics. D: Applied Physics, 44(49).
https://doi.org/10.1088/0022-3727/44/49/495001

Fedotova JA, Przewoznik J, Kapusta C, Milosavljević M, Kasiuk JV, Zukrowski J, Sikora M, Maximenko AA, Szepietowska D, Homewood KP. Magnetoresistance in FeCoZr-Al2O3 nanocomposite films containing metal core-oxide shell nanogranules. in Journal of Physics. D: Applied Physics. 2011;44(49).
doi:10.1088/0022-3727/44/49/495001 .

Fedotova, J. A., Przewoznik, J., Kapusta, Cz, Milosavljević, Momir, Kasiuk, J. V., Zukrowski, J., Sikora, M., Maximenko, A. A., Szepietowska, D., Homewood, Kevin P., "Magnetoresistance in FeCoZr-Al2O3 nanocomposite films containing metal core-oxide shell nanogranules" in Journal of Physics. D: Applied Physics, 44, no. 49 (2011),
https://doi.org/10.1088/0022-3727/44/49/495001 . .