Enhanced ferroelectric properties in Mn-doped K0.5Na0.5NbO3 thin films derived from chemical solution deposition

Abstract

Articles you may be interested inStructures, electrical properties, and leakage current behaviors of un-doped and Mn-doped lead-free ferroelectric K0.5Na0.5NbO3 films

Improved electrical properties for Mn-doped lead-free piezoelectric potassium sodium niobate ceramics

“…31 This process was accompanied by the increased valence state of Mn ions, as reported in Refs. 28 and 31.…”

Enhanced piezoelectric properties of Ta substituted-(K0.5Na0.5)NbO3 films: A candidate for lead-free piezoelectric thin films

“…However, their piezoelectric properties are generally inferior to those of bulk ceramics because of the difficulty in obtaining an ideal thin film [9]. Recently, Wang et al [10] demonstrated that Mn-doped KNN films (1.3 m in thickness) exhibited a low leakage current density and a well-saturated P-E hysteresis loop with a remanent polarization (P r ) of ∼7.2 C/cm 2 ; the piezoelectric properties were not reported. Abazari et al [11] demonstrated that Mn-doped (K,Na,Li)(Nb,Ta,Sb)O 3 thin film exhibited a effective piezoelectric coefficient, d 33,eff of ∼53 pm/V.…”

Microstructure-dependent leakage-current properties of solution-derived (K0.5Na0.5)NbO3 thin films

“…In both the vapour-and solution-based deposition routes for KNN films, volatilization of the alkali compounds has been identified as the major processing problem [3][4][5][6]. The loss of alkalis may hinder the control over the composition and promote the formation of undesirable, alkalideficient, secondary phases [4,5], as well as the formation of alkali and oxygen vacancies, which are thought to be the main reason for the large leakage currents observed in KNN films [5][6][7]. The non-ferroelectric response in KNN thin films was also related to chemical heterogeneities in the films evidenced by the presence of secondary phases [8].…”