Structural and piezo-ferroelectric properties of K0.5Na0.5NbO3 thin films grown by pulsed laser deposition and tested as sensors

Castañeda-Guzmán, R.; López-Juárez, Rigoberto; Gervacio, J.J.; Cruz, M. P.; Torre, S.D. De la; Pérez‐Ruiz, Santiago J.

doi:10.1016/j.tsf.2017.06.039

Cited by 7 publications

(2 citation statements)

References 25 publications

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“…Since 2004, the K x Na 1-x NbO 3 perovskitetype material has been established to be a potential substitute for PZT due to its high piezoelectric coefficient d 33 (up to 300 pC/N [5]) leading to an important investigation of this phase [6,7]. The K x Na 1-x NbO 3 perovskite phase has been investigated in bulk [8], thin films [9], single crystals [10] and for photovoltaic applications [11], energy storage [12], luminescence properties [13], sensors [14] or medical imaging [15]. However, in the KNN system, many other phases of potential interest exist without being thoroughly investigated.…”

Section: Introductionmentioning

confidence: 99%

Tetragonal tungsten bronze phase thin films in the K–Na–Nb–O system: Pulsed laser deposition, structural and dielectric characterizations

Aspe

Demange

Waroquet

et al. 2020

Journal of Alloys and Compounds

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Pulsed laser deposition parameters have been determined to synthesize pure Tetragonal Tungsten Bronze (TTB) phase thin films in the (K , Na)-Nb-O system (KNN). In relation to the high volatility of alkaline elements, it was found that the target composition and the targetsubstrate distance are of first importance. The TTB phase was identified by X-ray and electron diffraction and the surface microstructure consisting mainly of nanorods supports the formation of hallmark of the TTB phase. Poly-oriented nanorods have been obtained on both C-plane sapphire and (111)Pt/TiO 2 /SiO 2 /(001)Si substrates whereas horizontal nanorods oriented along the (hk0) planes have been grown on (100) and (110) SrTiO 3. All the nanorods are parallel together when grown on (110) SrTiO 3 and they present two in-plane orientations rotated of 90° from each other on (100) SrTiO 3. Dielectric characteristics (dielectric permittivity ε r , and loss tangent tanδ) have been measured at low (1 kHz-1 MHz) and high (1 GHz-40 GHz) frequencies, on films deposited on Pt coated silicon and sapphire, respectively. A value of ε r = 200 at 1 kHz with tanδ = 0.015 were measured in a parallel plate capacitor configuration, whereas ε r = 130 and tanδ = 0.20 at 10 GHz were retrieved from transmission lines printed on the KNN TTB thin film grown on C-plane sapphire. Raman investigations of the TTB films were performed in the temperature range 77-873 K, confirming the TTB phase formation and the absence of structural transition. Piezoelectric Force Microscopy measurements evidenced a piezoelectric signal although no switching could be performed. However the dielectric measurements, complicated by high leakage currents when a DC voltage was applied, did not evidence any proof of ferroelectricity for the undoped KNN TTB films whereas results reported on other niobates (A,A') 0.6 Nb 10 O 30 (with A: K, Na and A': Sr, Ba, Ca) have shown Curie temperatures, lying between 156°C and 560°C, separating the paraelectric phase (space group: P4/mbm N°127) and the ferroelectric one (space group: P4bm N°100).

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Section: Introductionmentioning

confidence: 99%

Tetragonal tungsten bronze phase thin films in the K–Na–Nb–O system: Pulsed laser deposition, structural and dielectric characterizations

Aspe

Demange

Waroquet

et al. 2020

Journal of Alloys and Compounds

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“…The deposition temperature and oxygen partial pressure effects on the structures and electrical properties of KNN‐based films were also analyzed, and the optimum conditions have been reported for the deposition of the (K 0.5 ,Na 0.5 )NbO 3 and the Li + , Ta 5+ , and CaZrO 3 co‐doped films with pure perovskite phase, better homogeneity, improved crystallization, optimized crystal structure, and electrical properties . The film deposited under optimized conditions at 680 °C and 35 Pa oxygen pressure demonstrated a dielectric constant ( ε r ) of 1185 at 1 kHz, a P r of 14 µC cm −2 , and a coercive field ( E c ) of 82.7 kV cm −1…”

Section: Synthetic Techniquesmentioning

confidence: 99%

Potassium‐Sodium‐Niobate‐Based Thin Films: Lead Free for Micro‐Piezoelectrics

et al. 2019

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Extensive research and great progress of (K,Na)NbO 3 (KNN)-based lead-free piezoelectric films have been driven by the current legislation and the requirement for sustainable development of society and environment in the applications of microelectromechanical systems. A comprehensive discussion of the recent achievement in KNN-based films is presented herein. First, the available synthetic techniques, chemical modification, the ferroelectric and piezoelectric properties of KNN-based films are reviewed, followed by an introduction of the crystal structures and electrical properties of KNN-based epitaxial films in comparison with the bulk ceramics. Finally, the applications of KNN-based films for the sensors, the energy harvesters, and energy storage devices are addressed, and current challenges and prospects for future work are discussed.

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Perovskite-like structure ceramic materials and their design for electrical applications

Reyes-Montero

Castañeda-Guzmán

Villafuerte‐Castrejon

et al. 2023

Perovskite Ceramics

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Structural and piezo-ferroelectric properties of K0.5Na0.5NbO3 thin films grown by pulsed laser deposition and tested as sensors

Cited by 7 publications

References 25 publications

Tetragonal tungsten bronze phase thin films in the K–Na–Nb–O system: Pulsed laser deposition, structural and dielectric characterizations

Tetragonal tungsten bronze phase thin films in the K–Na–Nb–O system: Pulsed laser deposition, structural and dielectric characterizations

Potassium‐Sodium‐Niobate‐Based Thin Films: Lead Free for Micro‐Piezoelectrics

Perovskite-like structure ceramic materials and their design for electrical applications

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