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Magnetic properties in amorphous multilayer nanostructures [(CoFeB)60C40/SiO2]200 and [(CoFeB)34(SiO2)66/C]46 with different content of the CoFeB magnetic alloy in metal-composite layers and inverse location of non-metallic phases C and SiO2 in composite layers or in interlayers, were investigated by magneto-optical methods in the transversal Kerr effect (TKE) geometry.Using the spectral and field dependences of the transversal Kerr effect TKE, it has been established that in the samples of both magnetic multilayer nanostructures (MLNS) the magneto-optical response and magnetic order are determined by the phase composition of the composite layers.In samples of MLNS [(CoFeB)60C40/SiO2]200 with a post-percolation content of metal clusters in metal-composite layers, the maximum of absolute TKE values decrease by about 2.5 times compared with the initial amorphous Co40Fe40B20 alloy, while the field dependences of TKE in samples of this MLNS has features that are characteristic of soft ferromagnets.In samples of MLNS [(CoFeB)34(SiO2)66/C]46 with a pre-percolation content of metal clusters in the oxide SiO2–x matrix of metal-composite layers, the TKE spectral dependences fundamentally differed from the TKE of the initial amorphous Co40Fe40B20 alloy both in shape and sign. The field dependences of the TKE in the samples of this MLN were linear, characteristic of superparamagnets. References1. Neugebauer C. A. Resistivity of cermet filmscontaining oxides of silicon. Thin Solid Films. 1970;6(6):443–447. DOI: https://doi.org/10.1016/0040-6090(70)90005-22. Gittleman J. L., Goldstain Y., Bozowski S.Magnetic roperties of granular nikel films. PhysicalReview B. 1972;5(9): 3609–3621. DOI: https://doi.org/10.1103/physrevb.5.36093. Abeles B., Sheng P., Coutts M. D., Arie Y.Structural and electrical properties of granular metalfilms. Advances in Physics. 1975;24(3): 407–461. DOI:https://doi.org/10.1080/000187375001014314. Helman J. S., Abeles B. Tunneling of spinpolarizedelectrons and magnetoresistance in granularNi films. Physical Review Letters. 1976;37(21): 1429–1433. DOI: https://doi.org/10.1103/physrevlett.37.14295. Sheng P., Abeles B., Arie Y. Hopping conductivityin granular Metals. Physical Review Letters,1973;31(1):44–47. DOI: https://doi.org/10.1103/physrevlett.31.446. Domashevskaya E. P., Builov N. S., Terekhov V. A.,Barkov K. A., Sitnikov V. G. Electronic structure andphase composition of dielectric interlayers inmultilayer amorphous nanostructure [(CoFeB)60C40/SiO2]200. Physics of the Solid State. 2017;59(1): 168–173.DOI: https://doi.org/10.1134/S10637834170100617. Domashevskaya E. P., Builov N. S., Terekhov V. A.,Barkov K. I., Sitnikov V. G., Kalinin Y. E. Electronicstructure and phase composition of silicon oxide inthe metal-containing composite layers of a[(Co40Fe40B20)34(SiO2)66/C]46 multilayer amorphousnanostructure with carbon interlayers. InorganicMaterials. 2017;53(9): 930–936. DOI: https://doi.org/10.1134/S00201685170900608. Domashevskaya E. P., Builov N. S., Lukin A. N.,Sitnikov V. G. Investigation of interatomic interactionin multilayer nanostructures [(CoFeB)60C40/SiO2]200 and[(Co40Fe40B20)34(SiO2)66/C]46 with composite metalcontaininglayers by IR spectroscopy. InorganicMaterials. 2018;54(2): 153–159. DOI: https://doi.org/10.7868/s0002337x180200699. Domashevskaya E. P., Builov N. S., Ivkov S. A.,Guda A. A., Trigub A. L., Chukavin A. I. XPS and XASinvestigations of multilayer nanostructures based onthe amorphous CoFeB alloy. Journal of ElectronSpectroscopy and Related Phenomena. 2020;243:146979–146989. DOI: https://doi.org/10.1016/j.elspec.2020.14697910. Vonsovskii S. V. Magnetizm [Magnetism].Moscow: Nauka Publ.; 1971. 1032 p.11. Gan’shina E., Granovsky A., Gushin V.,Kuzmichev M., Podrugin P., Kravetz A., Shipil E. Opticaland magneto-optical spectra of magnetic granularalloys. Physica A: Statistical Mechanics and itsApplications. 1997;241(1-2): 45–51. DOI: https://doi.org/10.1016/s0378-4371(97)00057-512. Gan’shina E. A., Kim C. G., Kim C. O.,Kochneva M. Yu., Perov N. S., Sheverdyaeva P. M.Magnetostatic and magneto-optical properties of Cobasedamorphous ribbons. Journal of Magnetism andMagnetic Materials. 2002;239(1-3): 484–486. DOI:https://doi.org/10.1016/s0304-8853(01)00665-513. Gan’shina E. A., Vashuk M. V. Evolution of theoptical and magnetooptical properties of amorphousmetal-insulator nanocomposites. Journal ofExperimental and Theoretical Physics. 2004;98:1027–1036. DOI: https://doi.org/10.1134/1.176757114. Shalygina E. E., Kharlamova A. M., KurlyandskayaG. V., Svalov A. V. Exchange interaction in Co/Bi/Co thin-film systems with Bi interlayer. Journal ofMagnetism and Magnetic Materials. 2017;440: 136–139.DOI: https://doi.org/10.1016/j.jmmm.2016.12.14415. Gan’shina E., Garshin V., Perova N., Zykov G.,Aleshnikov A., Kalinin Yu., Sitnikov A. Magnetoopticalproperties of nanocomposites ferromagneticcarbon.Journal of Magnetism and Magnetic Materials.2019;470:135–138. DOI: https://doi.org/10.1016/j.jmmm.2017.11.03816. Buravtsova V. E., Ganshina E. A., Kirov S. A., et.al. Magnetooptical properties of layer-by-layerdeposited ferromagnet – dielectric nanocomposites.Materials Sciences and Applications. 2013;4(4): 16–23.DOI: http://dx.doi.org/10.4236/msa.2013.44A00317. Stognei O. V., Kalinin Yu. E., Zolotukhin I. V.,Sitnikov A. V., Wagner V., Ahlers F. J. Low temperaturebehaviour of the giant magnetoresistivity in CoFeB– SiOn granular composites. Journal of Physics:Condensed Matter. 2003;15(24): 4267–4772. DOI:https://doi.org/10.1088/0953-8984/15/24/32018. Stognei O. V., Sitnikov A. V. Anisotropy ofamorphous nanogranular composites CoNbTa-SiO nand CoFeB-SiOn. Physics Solid State. 2010;52: 2518–2526. DOI: https://doi.org/10.1134/S106378341012012719. Dunets O. V., Kalinin Y. E., Kashirin M. A. et al.Electrical and magnetic performance of multilayerstructures based on (Co40Fe40B20)33.9(SiO2)66.1 composite.Technical Physics. 2013;58: 1352–1357. DOI: https://doi.org/10.1134/S106378421309013220. Gridnev S. A., Kalinin Yu. E., Sitnikov A. V.,Stognei O. V. Nelineinye yavleniya v nano imikrogeterogennykh sistemakh [Nonlinear phenomenain nano and microheterogeneous systems]. Moscow:BINOM, Laboratoriya znanii Publ.; 2012. 352 p.21. Mørup S., Tronc E. Superparamagneticrelaxation of weakly interacting particles. PhysicalReview Letters. 1994;72(20): 3278–3285. DOI: https://doi.org/10.1103/PhysRevLett.72.327822. Coey J. M. D., Khalafalla D. Superparamagneticg-Fe2O3. Physica Status Solidi (a) 1972;11(1): 229–241.DOI: https://doi.org/10.1002/pssa.221011012523. Brown W. F. Thermal fluctuations of a singledomainparticle. Physical Review. 1963;130(5): 1677–1685. DOI: https://doi.org/10.1103/physrev.130.1677

Методом ионно-лучевого распыления двух мишеней (одна из сплава CoFeB, вторая из TiO2) на вращающуюся ситалловую подложку получена серия образцов с градиентом состава и толщины композита (CoFeB)x(TiO2)1–x. На дифрактограммах aморфных композитов обнаружено гало, соответствующее среднему межатомному расстоянию, близкому по величине к значениям межплоскостных расстояний самых интенсивных дифракционных линий в сплавах CoFe. Методом ИК-спектроскопии проведена идентификация мод, соответствующих межатомным связям в аморфных композитах (CoFeB)x(TiO2)1–x различного состава. Установлено наличие связей с кислородом всех элементов композита Fe–O, Co–O, Ti–O, B-O, а также образование промежуточных химических связей Ti–O–B, Ti–O–Co между атомами диэлектрической и металлической компонент композита. На основе полученных данных предложена модель аморфных композитов (Co45Fe45B10)x(TiO2)1–x, в которой металлические частицы представляются в виде ядра из металлических кластеров CoFe с оболочкой из оксидов и боридов/оксиборидов d-металлов, распределенных в диэлектрической матрице диоксида титана TiO2–х. ИСТОЧНИК ФИНАНСИРОВАНИЯРабота выполнена при поддержке Минобрнауки России в рамках государственного заданияВУЗам в сфере научной деятельности на 2017–2019 годы. Проект № 3.6263.2017/ВУ. REFERENCES Zolotukhin I. V., Kalinin Yu. E., Stognay O. V. New directions of physical materials science. Voronezh, Voronezh State University Publ., 2000, 456 p. (in Russ.) Gridnev S. A., Kalinin Yu. E., Sitnikov A. V., Stognay O.V. Nonlinear phenomena in nano- and microheterogeneous systems. Moscow, BINOM. Lab knowledge Publ., 2012, 352 p. (in Russ.) Stognay O. V. Electric transport and magnetic properties of amorphous nano-granulated metal-dielectric composites. Doc. Sci. diss, Voronezh, 2004, 280 p. Diany B., Serious V.S., Metin, Parkin S., Gurney B. A., Baumgart P., Wilhoit D. R. Magnetotransport properties of magnetically soft spin-valve structures. J. Appl. Phys., 1991, v. 69(9), pp. 4774–4779. https://doi.org/10.1063/1.348252 Kalinin Yu. E., Sitnikov A. V., Stognei O. V., Zolotukhin I.V., Neretin P.V. Electrical properties and giant vagnetoresistance of the CoFeB–SiO2 amorphous granular composites. Materials Science and Engineering: A, 2001, v. 304–306, pp. 941–945. https://doi.org/10.1016/s0921-5093(00)01606-3 Kotov L. N., Turkov V. K., Vlasov V. S., Lasek M. P., Kalinin Yu. E., Sitnikov A. V. Conductive, magnetic and structural properties of multilayer fi lms. IOP Conf. Series: Materials Science and Engineering, 2013, v. 47. 012027. https://doi.org/10.1088/1757-899X/47/1/012027 Domashevskaya E. P., Storozhilov S. A., Turishchev S. Yu., Kashkarov V. M., Terekhov V. A., Stogney O. V., Kalinin Yu. E., Sitnikov A. V., Molodtsov S. L. XANES and USXES studies of interatomic interactions in (Co41Fe39B20)x(SiO2)1−x nanocomposites. Physics of the Solid State, 2008, v. 50(1), pp. 139–145. https://doi.org/10.1134/S1063783408010253 Shchekochikhin A. V., Domashevskaya E. P., Karpov S. I. Effect of elemental composition based on CoFeB-SiO2 on magnetic and magnetoresistive properties. Kondensirovannye sredy i mezhfaznye granitsy [Condensed Matter and Interphases], 2006, v. 8(1), pp. 64–66. URL: http://www.kcmf.vsu.ru/resources/t_08_1_2006_013.pdf (in Russ.) Domashevskaya E. P., Chan Van Tu, Chernyshev A. V., Lukin A. N. Investigation of the interato mic interaction in multilayer nanostructures (Co45Fe45Zr10/a-Si)40 and (Co45Fe45Zr10/SiO2) by method of IR-spectroscopy and small angle diffraction. Condensed Matter and Interphases, 2017, v. 19(2), pp. 195–204. https://doi.org/10.17308/kcmf.2017.19/192 (in Russ.) JCPDS − International Centrefor Diffraction Data. 2001, no. 51−0740. JCPDS − International Centre for Diffraction Data. 2001, no. 49−1588. JCPDS − International Centre for Diffraction Data. 2001, no. 48−1817. Kongfa Chen, Lihua Fang, Teng Zhang, San Ping Jiang. New zinc andbismuth doped glass sealants with substantially suppressed borondeposition and poisoning for solid oxide fuel cells. J. Mater. Chem. A, 2014, v. 2(43), pp. 18655–18665. https://doi.org/10.1039/c4ta02951h Wenjie Zhang, Bo Yang, Jinlei Chen. Effects of calcination temperature on preparation of borondoped TiO2 by sol-gel method. International Journal of Photoenergy, 2012, v. 2012, pp. 1–8. https://doi.org/10.1155/2012/528637 Rihcard A., Nyquistand R., Kagel O. Infrared Spectra of Inorganic Compounds. New York and London, Academic Press, 1971, 499 p. Milovanov Yu. S., Kuznetsov G. V., Skryshevsky V. A., Stupan S. M. Transport of Charge in Nanocomposite Structures of Silicon-SiO2, Silicon-TiO2. Semiconductors, 2014, v. 48(10), pp. 1335–1341. https://doi.org/10.1134/s1063782614100200 Chetverikova A. G., Maryakhina V. S. Studies of polymineral clay containing three-layer aluminosilicates by physical methods. Bulletin of the Orenburg State University, 2015, no. 1 (176), pp. 250–255. (in Russ.) Shchekochikhin A. V., Domashevskaya E. P., Karpov S. I., Stognei O. V. Interatomic interaction and modes of IR spectra in amorphous nanocomposites (Co45Fe45Zr10)x(SiO2)1–x. Proceedings of Voronezh State University. Series: Physics. Mathematics, 2008, no. 1, pp. 109–114. URL: http://www.vestnik.vsu.ru/pdf/physmath/2008/01/schekochihin.pdf (in Russ.) María E., Pérez Bernal, Ricardo J., Ruano Casero, Vicente Rives. Mixed Oxides Co-Fe Mixed Oxides & Calorie/Calcination of Layered Double. Ceramics– Silikáty, 2004, v. 48(4), pp. 145–154. URL: https://www.irsm.cas.cz/materialy/cs_content/2004/Bernal_CS_2004_0000.pdf Nicholas T. Nolan, Michael K. Seery, Suresh C. Pillai. Spectroscopic investigation of the anatase-torutile transformation of sol-gel synthesised TiO2 photocatalysts // J. of Physical Chemistry C, 2009, v. 113, pp. 16151–16157. https://doi.org/10.1021/jp904358g