Origin of Surface Morphology Variation During Pulsed Laser Deposition of ${\rm YBa}_{2}{\rm Cu}_{3}{\rm O}_{7}$ Superconducting Films

Pysarenko, Serhiy; Pan, Alexey V.; Dou, Shi Xue

doi:10.1109/tasc.2010.2092404

Cited by 8 publications

(12 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4,34,68,74 , films deposited at low repetition rates had smoother surfaces, which is in opposite to our results provided in Table I. However in those works, the roughness was studied on thicker films (> 200 nm) with highly developed surface structures containing outgrowths, holes, pinholes and other defects formed due to incomplete island coalescence of relatively thick films 4,34 or stress-guided surface roughening after complete coalescence 5,33,35 .…”

Section: B Ybco Thin Filmscontrasting

confidence: 99%

“…Upon deposition on highly developed surface with low deposition rates adatoms have more time to diffuse to sites with high coordination number, reducing roughness as observed in Refs. 4,34,68,74 . In our work, the roughness (Table I) was measured in much thinner films, reflecting the dependence of StranskiKrastanov 2D/3D island structure on laser frequency.…”

Section: B Ybco Thin Filmsmentioning

confidence: 99%

“…For physical vapour deposition (PVD) technologies, this control is conventionally achieved by manipulating interdependent parameters, such as temperature, atmosphere, flux of material, resultant film thickness [1][2][3][4][5][6] and laser frequency [6][7][8][9][10] . In particular, the laser frequency for pulsed-based deposition (PLD) influences the film structure in many different ways, whose mechanisms can be contentious and not easily understood [7][8][9][10][11] .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Significant tunability of thin film functionalities enabled by manipulating magnetic and structural nano-domains

Golovchanskiy

Pan

Fedoseev

et al. 2014

Applied Surface Science

Self Cite

View full text Add to dashboard Cite

The influence of laser frequency on the structure and physical properties of thin films grown by pulsed laser deposition has been studied. Different types of thin films, hard ferromagnetic FePt L10 and quasi-single crystal superconducting YBa2Cu3O7 (YBCO), have been used for demonstration of the effect. Significant structural modifications have been obtained for the films with similar thicknesses. These modifications are shown to dramatically control their corresponding properties, providing an instrumental ability for tuning the practical characteristics of the films by changing the laser frequency of their deposition. In particular, 20-fold increase of coercive field and modification of demagnetization mechanism are obtained for FePt films by varying the frequency from 1 Hz to 6 Hz. Over a similar frequency range, a strong dependence on the laser frequency is discovered for the YBCO films for the critical current density behavior as a function of the applied magnetic field [ Jc(Ba)] with the unexpected reversal of Jc(Ba) curves with temperature. The mechanisms of structure modifications and corresponding property variations are proposed. The influence of laser frequency on the structure and physical properties of thin films grown by pulsed laser deposition has been studied. Different types of thin films, hard ferromagnetic FePt L10 and quasi-single crystal superconducting YBa2Cu3O7 (YBCO), have been used for demonstration of the effect. Significant structural modifications have been obtained for the films with similar thicknesses. These modifications are shown to dramatically control their corresponding properties, providing an instrumental ability for tuning the practical characteristics of the films by changing the laser frequency of their deposition. In particular, 20-fold increase of coercive field and modification of demagnetization mechanism are obtained for FePt films by varying the frequency from 1 Hz to 6 Hz. Over a similar frequency range, a strong dependence on the laser frequency is discovered for the YBCO films for the critical current density behaviour as a function of the applied magnetic field [Jc(Ba)] with the unexpected reversal of Jc(Ba) curves with temperature. The mechanisms of structure modifications and corresponding property variations are proposed.

show abstract

Section: B Ybco Thin Filmscontrasting

confidence: 99%

Section: B Ybco Thin Filmsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Significant tunability of thin film functionalities enabled by manipulating magnetic and structural nano-domains

Golovchanskiy

Pan

Fedoseev

et al. 2014

Applied Surface Science

Self Cite

View full text Add to dashboard Cite

show abstract

“…It can effectively be achieved by a simple control of PLD parameters for this binary compound, compared to a more complicated multielement compositions [18]. We propose and experimentally confirm the new behaviour of thin film growth kinetics, which can be easily tuned by laser frequency.…”

Section: Introductionmentioning

confidence: 58%

Quantitative model for tunable microstructure in magnetic FePt thin films by pulsed laser deposition

Golovchanskiy¹,

Fedoseev²,

Pan³

2013

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

Golovchanskiy, I. A., Fedoseev, S. A. & Pan, A. V. (2013). Quantitative model for tunable microstructure in magnetic FePt thin films by pulsed laser deposition. Journal of Physics D: Applied Physics, 46 (21), 215502-1-215502-8.Quantitative model for tunable microstructure in magnetic FePt thin films by pulsed laser deposition AbstractPulsed laser deposition (PLD) is employed to fabricate FePt L10 thin films from elemental targets. Dramatic structure variations are obtained by varying the laser frequency while keeping the thickness of the films constant. A new theoretical model based on the mean field approach is proposed, which quantitatively describes the structural changes obtained experimentally. The experiment and the model exhibit the opposite growth development to the trend reported for the modulated flux in the literature. The new model considers different growth rates in the lateral and transverse directions due to different responses of the normal and tangential film surfaces being deposited to the incident flux and the migration kinetics of adatoms and clusters. The quantitative results obtained confirm that the migration kinetics and self-assembly can easily be controlled by the PLD frequency which is consistent with the experiments. Magnetic properties of the films are shown to be extremely sensitive to the structure variations allowing practical tunability. © 2013 IOP Publishing Ltd. Abstract. Pulsed laser deposition (PLD) has been employed to fabricate FePt L1 0 thin films from elemental targets. Dramatic structure variations have been obtained by varying the laser frequency while keeping the thickness of the films constant. A new theoretical model based on the mean field approach is proposed, which quantitatively describes the structural changes obtained experimentally. The experiment and the model exhibit the opposite growth development to the trend reported for the modulated flux in the literature. The new model considers different growth rates in lateral and transverse directions due to different responses of the normal and tangential film surfaces being deposited to the incident flux and the migration kinetics of adatoms and clusters. The quantitative results obtained confirm that the migration kinetics and self-assembly can easily be controlled by the PLD frequency which is consistent with the experiments. Magnetic properties of the films are shown to be extremely sensitive to the structure variations allowing practical tunability.

show abstract

“…Pysarenko et al 33 explained the effect of TSD based on the reaction time of adatoms. In the case of small TSD, the reaction time is very short for the highly energetic adatoms resulting in an incomplete coalescence that will create voids between the growing grains.…”

Section: Target-to-substrate Distancementioning

confidence: 99%

Pulsed laser deposition to synthesize the bridge structure of artificial nacre: Comparison of nano- and femtosecond lasers

Melaibari

Molian

2012

Journal of Applied Physics

View full text Add to dashboard Cite

Nature offers inspiration to new adaptive technologies that allow us to build amazing shapes and structures such as nacre using synthetic materials. Consequently, we have designed a pulsed laser ablation manufacturing process involving thin film deposition and micro-machining to create hard/soft layered “brick-bridge-mortar” nacre of AlMgB14 (hard phase) with Ti (soft phase). In this paper, we report pulsed laser deposition (PLD) to mimic brick and bridge structures of natural nacre in AlMgB14. Particulate formation inherent in PLD is exploited to develop the bridge structure. Mechanical behavior analysis of the AlMgB14/Ti system revealed that the brick is to be 250 nm thick, 9 μm lateral dimensions while the bridge (particle) is to have a diameter of 500 nm for a performance equivalent to natural nacre. Both nanosecond (ns) and femtosecond (fs) pulsed lasers were employed for PLD in an iterative approach that involves varying pulse energy, pulse repetition rate, and target-to-substrate distance to achieve the desired brick and bridge characteristics. Scanning electron microscopy, x-ray photoelectron spectroscopy, and optical profilometer were used to evaluate the film thickness, particle size and density, stoichiometry, and surface roughness of thin films. Results indicated that both ns-pulsed and fs-pulsed lasers produce the desired nacre features. However, each laser may be chosen for different reasons: fs-pulsed laser is preferred for much shorter deposition time, better stoichiometry, uniform-sized particles, and uniform film thickness, while ns-pulsed laser is favored for industrial acceptance, reliability, ease of handling, and low cost.

show abstract

Origin of Surface Morphology Variation During Pulsed Laser Deposition of ${\rm YBa}_{2}{\rm Cu}_{3}{\rm O}_{7}$ Superconducting Films

Cited by 8 publications

References 34 publications

Significant tunability of thin film functionalities enabled by manipulating magnetic and structural nano-domains

Significant tunability of thin film functionalities enabled by manipulating magnetic and structural nano-domains

Quantitative model for tunable microstructure in magnetic FePt thin films by pulsed laser deposition

Pulsed laser deposition to synthesize the bridge structure of artificial nacre: Comparison of nano- and femtosecond lasers

Contact Info

Product

Resources

About