Effect of pulse laser frequency on PLD growth of LuFeO3 explained by kinetic simulations of in-situ diffracted intensities

Gabriel, Vít; Kocán, Pavel; Bauer, Sondes; Nergis, Berkin; Rodrigues, Adriana; Horák, Lukáš; Jin, Xiaowei; Schneider, Reinhard; Baumbach, Tilo; Holý, V.

doi:10.1038/s41598-022-09414-3

Cited by 4 publications

(2 citation statements)

References 34 publications

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“…The temperature of the layer, thus, formed increases when the next vapor pulse is deposited. The impact of the impinging flux of ablated particles on this temperature becomes more significant at higher deposition frequencies and should be considered, particularly when considering the formation of materials with low thermal conductivity using PLD [19].…”

Section: Pulsed Laser Depositionmentioning

confidence: 99%

Epitaxial Ferroelectric Thin Films: Potential for New Applications

Chirila,

G. Boni,

D. Filip

et al. 2024

Pulsed Laser Processing of Materials

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This chapter provides an overview of the versatile applications and properties of epitaxial ferroelectric materials obtained using the pulsed laser deposition technique. These materials can play a significant role in various electronic and sensing applications or energy harvesting. Materials that are ferroelectric and have a perovskite structure (ABO3 type) show spontaneous polarization that can be changed by an electric field, temperature, mechanical stress, or light. Here, we present results obtained on epitaxial ferroelectric thin films with different compositions, lead-based or lead-free, and the correlation with structural quality of the layers and with different electrostatic conditions induced either by the substrate or by the different dopants. Our studies revealed that the utilization of pulsed laser beam deposition technique is suitable for obtaining ultrathin films depositions with thicknesses measuring less than 5 nm. These results allowed us to reveal the impacts caused by polarization orientation on the band structure or the presence of self-doping phenomena. We also found that the conduction type can be modified by introducing 1% Fe and Nb on PbZrTiO3 (PZT) epitaxial layers. In the last part of this chapter, we report on obtaining of a lead-free epitaxial thin film and its properties in the energy storage field.

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Section: Pulsed Laser Depositionmentioning

confidence: 99%

Epitaxial Ferroelectric Thin Films: Potential for New Applications

Chirila,

G. Boni,

D. Filip

et al. 2024

Pulsed Laser Processing of Materials

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“…The optimization process of multiferroic heterostructures of our interest, based on bilayer systems of ferromagnetic materials such as the hexaferrite BaFe 12 O 19 and ferroelectric materials such as LuFeO 3 and YbFeO 3 , crucially requires first a high-quality bottom electrode, which remains stable at elevated growth temperatures Tg > 900 °C in an oxidizing atmosphere during the pulsed laser deposition (PLD) growth of the above-mentioned subsequent layers [ 1 , 2 , 3 , 4 , 5 ]. Platinum is one of the noble metals, and is widely used in the application field of metal-ferroelectric-metals (MFMs) [ 6 , 7 , 8 ], ferroelectric memories [ 9 ], and microelectromechanical systems (MEMSs) [ 10 ] due to its high melting point, inertness in hard atmospheres, and low resistivity.…”

Section: Introductionmentioning

confidence: 99%

Structural and Morphological Studies of Pt in the As-Grown and Encapsulated States and Dependency on Film Thickness

Nergis,

Bauer,

Jin

et al. 2024

Nanomaterials

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The morphology and crystal structure of Pt films grown by pulsed laser deposition (PLD) on yttria-stabilized zirconia (YSZ)at high temperatures Tg = 900 °C was studied for four different film thicknesses varying between 10 and 70 nm. During the subsequent growth of the capping layer, the thermal stability of the Pt was strongly influenced by the Pt film’s thickness. Furthermore, these later affected the film morphology, the crystal structure and hillocks size, and distribution during subsequent growth at Tg = 900 °C for a long duration. The modifications in the morphology as well as in the structure of the Pt film without a capping layer, named also as the as-grown and encapsulated layers in the bilayer system, were examined by a combination of microscopic and scattering methods. The increase in the thickness of the deposited Pt film brought three competitive phenomena into occurrence, such as 3D–2D morphological transition, dewetting, and hillock formation. The degree of coverage, film continuity, and the crystal quality of the Pt film were significantly improved by increasing the deposition time. An optimum Pt film thickness of 70 nm was found to be suitable for obtaining a hillock-free Pt bottom electrode which also withstood the dewetting phenomena revealed during the subsequent growth of capping layers. This achievement is crucial for the deposition of functional bottom electrodes in ferroelectric and multiferroic heterostructure systems.

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Effect of the laser fluence on the microstructure and the relating magnetic properties of BaFe12O19 films grown on YSZ(111) by PLD for optimized perpendicular recording

et al. 2023

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High-quality BaFe12O19 (BaM) films with high uniaxial anisotropy fields of HA = 17.5 and 18.5 kOe were obtained by pulsed laser deposition (PLD) at two fluences of 1.5 and 5.1 J/cm2 on YSZ(111) substrate, using a platinum interlayer for reducing lattice mismatch. We demonstrated that the microstructure, morphology, and stoichiometry of the hexaferrite BaFe12O19 films can be affected by raising the corresponding energy per pulse from 25 to 75 mJ. However, we also concluded that the increase of fluence leads to the formation of a non-stoichiometric BaM film through two nucleation steps and an output growth of small grains in addition to the increase of the defect density. In turn, this has contributed to the enhancement of the coercive field from Hc = 1769 Oe to Hc = 2166 Oe as it is required for the improvement of perpendicular recording resolution. We found that both the lateral coherent block size and misorientation of mosaic blocks are remarkably affected by the growth kinetics, which itself depends on the energy per pulse. For a deep understanding of the effect of laser fluence on the microstructure, chemical composition, and on the magnetic properties of thin BaM films, the results of complementary methods are combined. These methods comprise high-resolution X-ray diffraction, atomic force microscopy, high-resolution transmission electron microscopy (TEM), scanning TEM combined with energy-dispersive X-ray spectroscopy, and vibrating sample magnetometer. Graphical abstract

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Effect of pulse laser frequency on PLD growth of LuFeO3 explained by kinetic simulations of in-situ diffracted intensities

Cited by 4 publications

References 34 publications

Epitaxial Ferroelectric Thin Films: Potential for New Applications

Epitaxial Ferroelectric Thin Films: Potential for New Applications

Structural and Morphological Studies of Pt in the As-Grown and Encapsulated States and Dependency on Film Thickness

Effect of the laser fluence on the microstructure and the relating magnetic properties of BaFe12O19 films grown on YSZ(111) by PLD for optimized perpendicular recording

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