Abstract
The Hf–Sc–O films are synthesized by atomic layer deposition using hafnium tetrakis-diethylamide (Hf(N(C2H5)2)4, TDEAH), scandium tris-methylcyclopentadienyl (Sc(C5H4CH3)3), and water at 300 °C on (100) single crystal silicon wafers from SiOх oriented microrope arrays (OMRA). Samples are analyzed by a number of physicochemical techniques: single wave ellipsometry, X-ray photoelectron spectroscopy, X-ray diffraction, transmission and scanning electron microscopy. Growth per cycle values (a film thickness increase in one reaction step) for pure and mixed oxides are determined, phases formed in the films are characterized, the relationship between the surface morphology and the chemical composition is found, and the optical properties of the samples are investigated. The use of OMRA as wafers allows the reliable identification of the formation of an ordered δ-phase Hf3Sc4O12 of a rhombohedral structure type and space group \(R\bar{3}\).
REFERENCES
J. H. Choi, Y. Mao, and J. P. Chang. Development of hafnium based high-k materials – A review. Mater. Sci. Eng., R, 2011, 72, 97-136. https://doi.org/10.1016/j.mser.2010.12.001
W. Banerjee, A. Kashir, and S. Kamba. Hafnium oxide (HfO2) – a multifunctional oxide: A review on the prospect and challenges of hafnium oxide in resistive switching and ferroelectric memories. Small, 2022, 18, 2107575 https://doi.org/10.1002/smll.202107575
T. P. Smirnova, L. V. Yakovkina, and V. O. Borisov. Impact of lanthanum on the modification of HfO2 films structure. J. Rare Earths, 2015, 33, 857-862. https://doi.org/10.1016/S1002-0721(14)60496-8
P. Majumder, G. Jursich, and C. Takoudis. Structural phase transformation of Y2O3 doped HfO2 films grown on Si using atomic layer deposition. J. Appl. Phys., 2009, 105, 104106. https://doi.org/10.1063/1.3132830
Q. Tao, G. Jursich, P. Majumder, M. Singh, W. Walkosz, P. Gu, R. Klie, and C. Takoudis. Composition–structure-dielectric property of yttrium-doped hafnium oxide films deposited by atomic layer deposition. Electrochem. Solid-State Lett., 2009, 12, G50. https://doi.org/10.1149/1.3156833
C. Adelmann, H. Tielens, D. Dewulf, A. Hardy, D. Pierreux, J. Swerts, E. Rosseel, X. Shi, M. K. van Bael, J. A. Kittl, and S. van Elshocht. Atomic layer deposition of Gd-doped HfO2 thin films. J. Electrochem. Soc., 2010, 157, G105. https://doi.org/10.1149/1.3301663
A. Hardy, C. Adelmann, S. van Elshocht, H. van den Rul, M. K. van Bael, S. de Gendt, M. DOlieslaeger, M. Heyns, J. A. Kittl, and J. Mullens. Study of interfacial reactions and phase stabilization of mixed Sc, Dy, Hf high-k oxides by attenuated total reflectance infrared spectroscopy. Appl. Surf. Sci., 2009, 255, 7812-7817. https://doi.org/10.1016/j.apsusc.2009.04.184
C. Adelmann, P. Lehnen, S. van Elshocht, C. Zhao, B. Brijs, A. Franquet, T. Conard, M. Roeckerath, J. Schubert, O. Boissière, C. Lohe, and S. de Gendt. Growth of dysprosium-, scandium-, and hafnium-based third generation high- dielectrics by atomic vapor deposition. Chem. Vap. Deposition, 2007, 13, 567-573. https://doi.org/10.1002/cvde.200706604
L. Xu, T. Nishimura, Sh. Shibayama, T. Yajima, Sh. Migita, and A. Toriumi. Kinetic pathway of the ferroelectric phase formation in doped HfO2 films. J. Appl. Phys. 2017, 122, 124104 https://doi.org/10.1063/1.5003918
C. Adelmann, V. Sriramkumar, S. van Elshocht, P. Lehnen, T. Conard, and S. de Gendt. Dielectric properties of dysprosium- and scandium-doped hafnium dioxide thin films. Appl. Phys. Lett., 2007, 91, 162902. https://doi.org/10.1063/1.2798498
T. P. Smirnova, L. V. Yakovkina, V. O. Borisov, V. N. Kichai, V. V. Kaichev, and V. V. Kriventsov. Structure of HfO2 films and binary oxides on its base. J. Struct. Chem. 2012, 53(4), 708-714. https://doi.org/10.1134/S0022476612040130
L. V. Yakovkina, T. P. Smirnova, V. O. Borisov, V. N. Kichai, and V. V. Kaichev. Synthesis and properties of dielectric (HfO2)1–x(Sc2O3)x films. Inorg. Mater., 2013, 49(2). https://doi.org/10.1134/S0020168513020234
V. V. Kaichev, E. V. Ivanova, M. V. Zamoryanskaya, T. P. Smirnova, L. V. Yakovkina, and V. A. Gritsenko. XPS and cathodoluminescence studies of HfO2, Sc2O3 and (HfO2)1–x(Sc2O3)x films. Eur. Phys. J. Appl. Phys., 2013, 64, 10302. https://doi.org/10.1051/epjap/2013130005
J. Niinistö, K. Kukli, M. Heikkilä, M. Ritala, and M. Leskelä. Atomic layer deposition of high-k oxides of the group 4 metals for memory applications. Adv. Eng. Mater., 2009, 11, 223-234. https://doi.org/10.1002/adem.200800316
R. W. Johnson, A. Hultqvist, and S. F. Bent. A brief review of atomic layer deposition: From fundamentals to applications. Mater. Today, 2014, 17(5), 236-246. https://doi.org/10.1016/j.mattod.2014.04.026
J. A. Oke and T.-C. Jen. Atomic layer deposition and other thin film deposition techniques: From principles to film properties. J. Mater. Res. Technol., 2022, 21, 2481-2514. https://doi.org/10.1016/j.jmrt.2022.10.064
T. P. Smirnova, A. A. Saraev, I. V. Korolkov, V. N. Kitchai, and V. O. Borisov. The crystal structure of solid solutions formed in the HfO2–Sc2O3 nanoscale system. J. Cryst. Growth, 2019, 523, 125156. https://doi.org/10.1016/j.jcrysgro.2019.125156
G. A. Kalinovskaya, F. M. Spiridonov, and L. N. Komissarova. Phase equilibria in the HfO2–Sc2O3 system. J. Less-Сommon Met., 1969, 17(2), 151-159. https://doi.org/10.1016/0022-5088(69)90048-4
R. Blom, A. Hammel, A. Haaland, J. Weidlein, T. V. Timofeeva, and Y. T. Struchkov. Molecular structures of tris(methylcyclopentadienyl)-scandium and -ytterbium as studied by gas phase electron diffraction and molecular mechanics calculations: the scandium atom is too small to accommodate three pentahapto cyclopentadienyl rings. J. Organomet. Chem., 1993, 462(1/2), 131-139. https://doi.org/10.1016/0022-328x(93)83350-5
S. Ya. Khmel, E. A. Baranov, A. V. Zaikovskii, A. O. Zamchiy, E. A. Maximovskiy, D. V. Gulyaev, and K. S. Zhuravlev. Synthesis of silicon oxide nanowires by the GJ EBP CVD method using different diluent gases. Phys. Status Solidi A, 2016, 213, 1774-1782. https://doi.org/10.1002/pssa.201532955
A. O. Zamchiy, E. A. Baranov, and S. Ya. Khmel. Tin-catalyzed oriented array of microropes of silicon oxide nanowires synthesized on different substrates. Vacuum, 2018, 147, 99-106. https://doi.org/10.1016/j.vacuum.2017.10.028
M. S. Lebedev, S. Ya. Khmel, M. N. Lyulyukin, D. E. Petukhova, and A. V. Barsukov. Low-temperature fabrication of SiOx–TiO2 core-shell nanowires for photocatalytic application. Vacuum, 2019, 165, 51-57. https://doi.org/10.1016/j.vacuum.2019.03.059
D. A. Holmes. On the calculation of thin film refractive index and thickness by ellipsometry. Appl. Opt., 1967, 6(1), 168/169. https://doi.org/10.1364/AO.6.000168
Powder Diffraction File, release 2022. Newtown, Pennsylvania, USA: International Centre for Diffraction Data, 2022.
M. Coll and M. Napari. Atomic layer deposition of functional multicomponent oxides. APL Mater., 2019, 7, 110901. https://doi.org/10.1063/1.5113656
X. Shi, H. Tielens, S. Takeoka, T. Nakabayashi, L. Nyns, Ch. Adelmann, A. Delabie, T. Schram, L. Ragnarsson, M. Schaekers, L. Date, R. Schreutelkamp, and S. V. Elshocht. Development of ALD HfZrOx with TDEAH/TDEAZ and H2O. J. Electrochem. Soc., 2011, 158, H69. https://doi.org/10.1149/1.3516476
D. M. Hausmann, E. Kim, J. Becker, and R. G. Gordon. Atomic layer deposition of hafnium and zirconium oxides using metal amide precursors. Chem. Mater., 2002, 14(10), 4350-4358. https://doi.org/10.1021/cm020357x
M. S. Lebedev, V. N. Kruchinin, M. Yu. Afonin, I. V. Korolkov, A. A. Saraev, A. A. Gismatulin, and V. A. Gritsenko. Optical properties and charge transport of textured Sc2O3 thin films obtained by atomic layer deposition. Appl. Surf. Sci., 2019, 478, 690-698. https://doi.org/10.1016/j.apsusc.2019.01.288
A. J. M. Mackus, J. R. Schneider, C. MacIsaac, J. G. Baker, and S. F. Bent. Synthesis of doped, ternary, and quaternary materials by atomic layer deposition: A review. Chem. Mater., 2019, 31, 1142-1183. https://doi.org/10.1021/acs.chemmater.8b02878
V. V. Atuchin, M. S. Lebedev, I. V. Korolkov, V. N. Kruchinin, E. A. Maksimovskii, and S. V. Trubin. Composition-sensitive growth kinetics and dispersive optical properties of thin HfxTi1–xO2 (0 x 1) films prepared by the ALD method. Mater. Electron., 2019, 30, 812-823. https://doi.org/10.1007/s10854-018-0351-z
R. L. Puurunen. Growth per cycle in atomic layer deposition: A theoretical model. Chem. Vap. Deposition, 2003, 9, 249-257. https://doi.org/10.1002/cvde.200306265
S. Bosch, J. Ferre-Borrull, N. Leinfellner, and A. Canillas. Effective dielectric function of mixtures of three or more materials: a numerical procedure for computations. Surf. Sci., 2000, 453, 9-17. https://doi.org/10.1016/S0039-6028(00)00354-X
M. S. Lebedev, V. N. Kruchinin, M. I. Lebedeva, and E. V. Spesivtsev. Compositionally tunable optical properties of hafnium titanium oxide deposited by atomic layer deposition without intermediate surface hydroxylation. Thin Solid Films, 2017, 642, 103-109. https://doi.org/10.1016/j.tsf.2017.09.014
V. Cremers, R. Puurunen, and J. Dendooven. Conformality in atomic layer deposition: Current status overview of analysis and modelling. Appl. Phys. Rev., 2019, 6, 021302. https://doi.org/10.1063/1.5060967
B. L. Greenberg, K. P. Anderson, M. A. Wolak, A. G. Jacobs, J. A. Wollmershauser, and B. N. Feigelson. Temperature excursions due to the reaction heat produced by atomic layer deposition on nanostructured substrates. Chem. Mater., 2020, 32, 10155-10164. https://doi.org/10.1021/acs.chemmater.0c03644
R. Katamreddy, R. Inman, G. Jursich, A. Soulet, and C. Takoudis. Effect of film composition and structure on the crystallization point of atomic layer deposited HfAlOx using metal (diethylamino) precursors and ozone. Acta Mater., 2008, 56, 710-718. https://doi.org/10.1016/j.actamat.2007.10.017
J. Niinistö, M. Putkonen, L. Niinistö, F. Song, P. Williams, P. N. Heys, and R. Odedra. Atomic layer deposition of HfO2 thin films exploiting novel cyclopentadienyl precursors at high temperatures. Chem. Mater., 2007, 19, 3319-3324. https://doi.org/10.1021/cm0626583
J. Baek, W. Choi, H. Kim, S. Cheon, Y. Byun, W. Jeon, and J.-S. Park. Plasma-enhanced atomic layer deposited HfO2 films using a novel heteroleptic cyclopentadienyl based Hf precursor, Ceram. Int., 2021, 47, 29030-29035. https://doi.org/10.1016/j.ceramint.2021.07.065
J. Gope, Vandana, N. Batra, J. Panigrahi, R. Singh, K. K. Maurya, R. Srivastava, and P. K. Singh. Silicon surface passivation using thin HfO2 films by atomic layer deposition. Appl. Surf. Sci., 2015, 357, 635-642. https://doi.org/10.1016/j.apsusc.2015.09.020
U. Schroeder, E. Yurchuk, J. Müller, D. Martin, T. Schenk, P. Polakowski, C. Adelmann, M. I. Popovici, S. V. Kalinin, and T. Mikolajick. Impact of different dopants on the switching properties of ferroelectric hafnium oxide. Jpn. J. Appl. Phys., 2014, 53, 08LE02. https://doi.org/10.7567/JJAP.53.08LE02
A. V. Shlyakhtina, D. A. Belov, S. Yu. Stefanovich, I. V. Kolbanev, O. K. Karyagina, A. V. Egorov, S. V. Savilov, and L. G. Shcherbakova. -Phase-to-defect fluorite (order-disorder) transition in the R2O3–MO2 (R = Sc, Tm, Lu; M = Zr, Hf) systems, Mater. Res. Bull., 2011, 46, 512-517. https://doi.org/10.1016/j.materresbull.2011.01.001
J. Wen, Y. H. Li, M. Tang, J. A. Valdez, Y. Q. Wang, M. K. Patel, and K. E. Sickafus. Heavy and light ion irradiation damage effects in -phase Sc4Hf3O12. Nucl. Instrum. Methods Phys. Res., Sect. B, 2015, 365, 325-330. https://doi.org/10.1016/j.nimb.2015.04.011
M. K. Patel, K. E. Sickafus, and G. Baldinozzi. Divergent short- and long-range behavior in ion-irradiated -Sc4Hf3O12. Phys. Rev. Mater., 2020, 4, 093605. https://doi.org/10.1103/PhysRevMaterials.4.093605
M. Iwasaki, Y. Kanazawa, D. Manago, M. K. Patel, G. Baldinozzi, K. E. Sickafus, and M. Ishimaru. Anomalous structural phase transformation in swift heavy ion-irradiated -Sc3Hf4O12. J. Appl. Phys., 2022, 132, 075901. https://doi.org/10.1063/5.0098518
Funding
The work was supported by the Ministry of Science and Higher Education of the Russian Federation within projects Nos. 121031700313-8 (XRD), 121031800218-5 (synthesis and characterization of arrays of microropes consisting of nanowires), and 121031700314-5.
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Russian Text © The Author(s), 2023, published in Zhurnal Strukturnoi Khimii, 2023, Vol. 64, No. 3, 107605.https://doi.org/10.26902/JSC_id107605
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Petukhova, D.E., Vikulova, E.S., Korolkov, I.V. et al. Growth Features and Phase Composition of Hf–Sc–O thin Films Synthesized by Atomic Layer Deposition. J Struct Chem 64, 424–436 (2023). https://doi.org/10.1134/S0022476623030083
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DOI: https://doi.org/10.1134/S0022476623030083