Abstract
The influence of the magnetic and insulator layer thickness on the crystal structure and magnetoresistive properties of [Fe/SiO]n discontinuous multilayers has been studied. The results indicate that the decreasing of Fe layer thickness within the range from 10 to 3 nm leads to the transition of microstructure of the samples from nanocrystalline to amorphous. For all investigated systems in an as-deposited state, the isotropic nature of the field dependences of magnetoresistance is observed. For samples with layer thickness dFe = 4–6 nm and dSiO = 5 nm, the transition to isotropic MR occurs after annealing to 400 K. However, for samples with Fe layer thickness of 7–10 nm, such transition is not observed regardless of the effective thickness of insulator layer and annealing temperature.
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References
Miyazaki, T., Tezuka, N.: Giant magnetic tunneling effect in Fe/Al2O3/Fe junction. J. Magn. Magn. Mater. 139, L231–L234 (1995). https://doi.org/10.1016/0304-8853(95)90001-2
Pazukha, I.M., Shchotkin, V.V., Shkurdoda, Y.O.: Structure, magnetic and magnetoresistive properties of composite materials based on ferromagnetic metals and alloys with different types of dielectric matrix. Prog. Phys. Met. 20, 672–692 (2019). https://doi.org/10.15407/ufm.20.04.672
Lytvynenko, I.M., Hauet, T., Montaigne, F., Bibyk, V.V., Andrieu, S.: Time scales of bias voltage effects in FE/MgO-based magnetic tunnel junctions with voltage-dependent perpendicular anisotropy. J. Magn. Magn. Mater. 396, 333–337 (2015). https://doi.org/10.1016/j.jmmm.2015.08.064
Honda, S., Hirata, M., Ishimaru, M.: Tunneling magnetoresistance of ultra-thin Co-SiO2 granular films with narrow current channels. J. Magn. Magn. Mater. 290–291, 1053–1055 (2005). https://doi.org/10.1016/j.jmmm.2004.11.363
Balaev, D.A., Balaev, A.D.: Tunnel conductivity and tunnel magnetoresistance of the Fe–SiO Films: interplay of the magnetotransport and magnetic properties. Phys. Solid State 61, 1203–1210 (2019). https://doi.org/10.1134/S1063783419070047
Pazukha, I.M., Shkurdoda, Y.O., Chornous, A.M., Dekhtyaruk, L.V.: Magnetic and magnetoresistive properties of nanocomposites based on Co and SiO. Int. J. Mod. Phys. B 33, 1950113 (2019). https://doi.org/10.1142/S0217979219501133
Timofeev, A.A., Ryabchenko, S.M., Lozenko, A.F., Trotsenko, P.A., Stogneĭ, O.V., Sitnikov, A.V., Avdeev, S.F.: Investigations of the magnetic properties of the granular system Co0.6(Al2On)0.4 possessing isotropic positive magnetoresistance. Low Temp. Phys. 33, 974 (2007). https://doi.org/10.1063/1.2747075
Shkurdoda, Y.O., Pazukha, I.M., Chornous, A.M.: Peculiarity of magnetoresistance of discontinuous ferromagnetic thin films. Int. J. Miner. Metall. Mater 24, 1459–1463 (2017). https://doi.org/10.1007/s12613-017-1539-6
Boff, M.A.S., Hinrichs, R., Canto, B., Mesquita, F., Baptista, D.L., Fraga, G.L.F., Pereira, L.G.: Turn on of new electronic paths in Fe-SiO2 granular thin film. Appl. Phys. Lett. 105, 143112 (2014). https://doi.org/10.1063/1.4898094
Boff, M.A.S., Canto, B., Mesquita, F., Hinrichs, R., Fraga, G.L.F., Pereira, L.G.: Non-ohmic behavior of metal-insulator granular thin films in low-field regime (eΔV << kBT). J. Appl. Phys. 120, 155103 (2016). https://doi.org/10.1063/1.4965870
Takenoiri, S.: The current status and future of granular media. J. Magn. Magn. Mater. 321, 562–565 (2009). https://doi.org/10.1016/j.jmmm.2008.07.013
Silva, H., Gomes, H.L., Pogorelov, Yu.G., Stallinga, P., de Leeuw, D.M., Araujo, J.P., Sousa, J.B., Meskers, S.C.J., Kakazei, G., Cardoso, S., Freitas, P.P.: Resistive switching in nanostructured thin films. Appl. Phys. Lett. 94, 202107 (2009). https://doi.org/10.1063/1.3134484
Fujimori, H., Ohnuma, S., Kobayashi, N., Masumoto, T.: Spintronics in metal–insulator nanogranular magnetic thin films. J. Magn. Magn. Mater. 304, 32–35 (2006). https://doi.org/10.1016/j.jmmm.2006.02.005
Sankar, S., Dieny, B., Berkowitz, A.E.: Spin-polarized tunneling in discontinuous CoFe/HfO2 multilayers. J. Appl. Phys. 81, 5512 (1997). https://doi.org/10.1063/1.364904
Dieny, B., Sankar, S., McCartney, M.R., Smith, D.J., Bayle-Guillemaud, P., Berkowitz, A.E.: Spin-dependent tunneling in discontinuous metal/insulator multilayers. J. Magn. Magn. Mater. 185, 283–292 (1998). https://doi.org/10.1016/S0304-8853(98)00028-6
Micha, J.S., Dieny, B., Regnard, J.R., Jacquotd, J.F., Sort, J.: Estimation of the Co nanoparticles size by magnetic measurements in Co-SiO2 discontinuous multilayers. J. Magn. Magn. Mater. 272–276, e967–e968 (2004). https://doi.org/10.1016/j.jmmm.2003.12.268
Vovk, A., García-García, A., Pogorelov, Y.G., Pardo, J.A., Štrichovanec, P., Magén, C., Algarabel, P.A., Araujo, J.P., Kakazei, G.N.: Probing the morphology of epitaxial Fe/MgO discontinuous multilayers by magnetometric technique. J. Magn. Magn. Mater. 474, 369–373 (2019). https://doi.org/10.1016/j.jmmm.2018.11.015
Denardin, J.C., Knobel, M., Dorneles, L.S., Schelp, L.F.: Structural and magnetotransport properties of discontinuous Co/SiO2 multilayers. Mater. Sci. Eng. B 112, 120–122 (2004). https://doi.org/10.1016/j.mseb.2004.05.016
Maurice, J.L., Briatico, J., Carrey, J., Petroff, F., Schelp, L.F., Vaures, A.: Clusters obtained by sputter deposition of cobalt atoms on alumina. Philos. Mag. A 79, 2921–2934 (1999). https://doi.org/10.1080/01418619908212033
Zhigalov, V.S., Frolov, G.I., Kveglis, L.I.: Nanocrystalline cobalt films prepared under ultrafast condensation conditions. Phys. Solid State 40, 1878–1883 (1998). https://doi.org/10.1134/1.1130677
Demin, G.D., Djuzhev, N.A., Popkov, A.F., Chinenkov, MYu.: Spin-polarized field emission and current-induced magnetization switching of nano-island magnetic thin films. J. Nano Microsystems Technol. 165, 24–29 (2014)
Honda, S., Ishikawa, T., Takai, K., Mitarai, Y., Harada, H.: New type magnetoresistance in Co/Si systems. J. Magn. Magn. Mater. 290–291, 1063–1066 (2005).https://doi.org/10.1016/j.jmmm.2004.11.459
Honda, S., Okada, T., Nawate, M., Tokumoto, M.: Tunneling giant magnetoresistance in heterogeneous Fe-SiO2 granular films. Phys. Rev. B 56, 14566–14573 (1997). https://doi.org/10.1103/PhysRevB.56.14566
Sankar, S., Berkowitz, A.E., Smith, D.J.: Spin-dependent transport of Co-SiO2 granular films approaching percolation. Phys. Rev. B 62, 14273–14278 (2000). https://doi.org/10.1103/PhysRevB.62.14273
Kleemann, W., Petracic, O., Binek, Ch., Kakazei, G.N., Pogorelov, Yu.G., Sousa, J.B., Cardoso, S., Freitas, P.P.: Interacting ferromagnetic nanoparticles in discontinuous Co80Fe20/Al2O3 multilayers: from superspin glass to reentrant superferromagnetism. Phys. Rev. B 63, 134423 (2001). https://doi.org/10.1103/PhysRevB.63.134423
Wang, C., Zhang, Y., Zhang, P., Rong, Y., Hsu, T.Y.: Influence of annealing on microstructure and magnetic-transport of FeCo–SiO2 nanogranular films. J. Magn. Magn. Mater. 320, 683–690 (2008). https://doi.org/10.1016/j.jmmm.2007.08.007
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This work was funded by the State Programs of the Ministry of Education and Science of Ukraine 0119U100777 and 0120U102005.
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Pazukha, I.M., Shkurdoda, Y.O., Petrenko, R.M. et al. Peculiarities of Magnetoresistance of [Fe/SiO]n Discontinuous Multilayers. J Supercond Nov Magn 34, 2601–2605 (2021). https://doi.org/10.1007/s10948-021-05914-x
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DOI: https://doi.org/10.1007/s10948-021-05914-x