Influence of rare earth addition in cobalt ferrite thin films obtained by pulsed laser deposition

Bulai, Georgiana; Trandafir, V.; Irimiciuc, Ștefan Andrei; Ursu, Laura; Focşa, Cristian; Gurlui, Silviu

doi:10.1016/j.ceramint.2019.06.284

Cited by 19 publications

(7 citation statements)

References 40 publications

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“…This can also be seen from the oscillation frequency evolution with the measurement distance where we notice a decrease of about 25% for both measured frequencies. Admittedly, the laser fluence values are much higher than those used in the pulsed-laser deposition or material processing applications, where we can find reports of fluences below 5 J/cm 2 [1][2][3][4][5][6], depending on the irradiation conditions and the nature of the thin film envisioned in each report. However, the results become relevant for the fundamental new generation of high-power laser-matter interactions.…”

Section: Langmuir Probe Measurementsmentioning

confidence: 97%

“…In the past few years, a great deal of interest has been given to fundamental aspects of high-power laser-matter interaction, especially in the context of the development of unique infrastructures that can generate novel applications. Pulsed-laser deposition has gained a lot of attention in the past 10 years as one of the best techniques to produce complex films with relatively complicated stoichiometry [1][2][3]. The technique has a proven flexibility in terms of the deposition geometry [4] and target or background gas nature [5,6].…”

Section: Introductionmentioning

confidence: 99%

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Charged Particle Oscillations in Transient Plasmas Generated by Nanosecond Laser Ablation on Mg Target

et al. 2020

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The dynamics of a transient plasma generated by laser ablation on a Mg target was investigated by means of the Langmuir probe method and fractal analysis. The empirical data showcased the presence of an oscillatory behavior at short expansion times (<1 μs) characterized by two oscillation frequencies and a classical behavior for longer evolution times. Space- and time-resolved analysis was implemented in order to determine main plasma parameters like the electron temperature, plasma potential, or charged particle density. In the motion fractal paradigm, a theoretical model was built for the description of laser-produced plasma dynamics expressed through fractal-type equations. The calibration of such dynamics was performed through a fractal-type tunneling effect for physical systems with spontaneous symmetry breaking. This allows both the self-structuring of laser-produced plasma in two structures based on its separation on different oscillation modes and the determination of some characteristics involved in the self-structuring process. The mutual conditionings between the two structures are given as joint invariant functions on the action of two isomorph groups of SL(2R) type through the Stoler-type transformation, explicitly given through amplitude self-modulation.

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Section: Langmuir Probe Measurementsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Charged Particle Oscillations in Transient Plasmas Generated by Nanosecond Laser Ablation on Mg Target

et al. 2020

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“…The experimental setup used for pulsed laser deposition of TiO 2 films is similar to that described in [39]. The disk-shaped targets with ~20 mm diameter and about 2 mm thickness were prepared from commercially available high purity (>99.50%) titanium (IV) oxide powder (BIOCHEM Chemopharma; product code: 320150500).…”

Section: Methodsmentioning

confidence: 99%

Effect of Target Sintering Temperature on the Morphological and Optical Properties of Pulsed Laser Deposited TiO2 Thin Films

et al. 2021

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In this paper, we report on the effect of titanium dioxide (TiO2) target sintering temperature on the morphological and optical properties of amorphous titanium dioxide thin films synthesized by pulsed laser deposition (PLD) on indium tin oxide (ITO) glass substrate and subsequently heat-treated in air at low temperature (150 °C). Three types of targets were used, unsintered (pressed at room temperature), sintered at 500 °C and sintered at 1000 °C. The surface morphology of the samples was investigated by scanning electron microscopy (SEM), and profilometry was used for thickness measurements. The structural properties of the films were examined by X-ray diffraction (XRD), while their optical properties were studied by UV‒vis spectroscopy. The obtained TiO2 thin films have an amorphous nature, as shown by XRD analysis. Profilometer showed that sintered target samples have more reliable thicknesses than unsintered ones. The SEM studies revealed the sufficient structural homogeneity of sintered target nanosized TiO2 films and agglomerates in the case of unsintered target film. The UV‒vis transmittance spectra showed high transparency in the visible range of PLD films, proportional to the target sintering temperature. The optical band gaps of the films deposited using the 500 °C and 1000 °C sintered targets are closer to those of anatase and rutile phases, respectively, which provides a promising approach to the challenges of amorphous TiO2-based nanostructures.

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“…Among these, there is a group of materials that are able to respond to a special stimulus through the alteration of the encircling physical and chemical features. These stimuli include the temperature (thermo-receptive materials), tension or pressure (mechanical-receptive materials), current or electrical tension (electro-receptive materials), magnetic field (magneto-receptive materials), change of the pH, of the solvent, or humidity (chemical-receptive materials) and light (photo-sensitive materials) [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

In-Situ Plasma Monitoring during the Pulsed Laser Deposition of Ni60Ti40 Thin Films

et al. 2020

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The properties of pulsed laser deposited of Ni60Ti40 shape memory thin films generated in various deposition conditions were investigated. In-situ plasma monitoring was implemented by means of space- and time-resolved optical emission spectroscopy, and ICCD fast camera imaging. Structural and chemical analyses were performed on the thin films using SEM, AFM, EDS, and XRD equipment. The deposition parameters influence on the chemical composition of the thin films was investigated. The peeled layer presented on DSC a solid-state transformation in a different transformation domain compared to the target properties. A fractal model was used to describe the dynamics of laser produced plasma through various non-differentiable functionalities. Through hydrodynamic type regimes, space-time homographic transformations were correlated with the global dynamics of the ablation plasmas. Spatial simultaneity of homographic transformation through a special SL(2R) invariance implies the description of plasma dynamics through Riccati type equations, establishing correlations with the optical emission spectroscopy measurements.

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Influence of rare earth addition in cobalt ferrite thin films obtained by pulsed laser deposition

Cited by 19 publications

References 40 publications

Charged Particle Oscillations in Transient Plasmas Generated by Nanosecond Laser Ablation on Mg Target

Charged Particle Oscillations in Transient Plasmas Generated by Nanosecond Laser Ablation on Mg Target

Effect of Target Sintering Temperature on the Morphological and Optical Properties of Pulsed Laser Deposited TiO2 Thin Films

In-Situ Plasma Monitoring during the Pulsed Laser Deposition of Ni60Ti40 Thin Films

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