Synthesis, Optical, and Magnetic Properties of Ba${}_2$Ni${}_3$F${}_{10}$ Nanowires

Abstract

A low temperature hydrothermal route has been developed, and pure phase Ba${}_2$Ni${}_3$F${}_{10}$ nanowires have been successfully prepared under the optimized conditions. Under the 325 nm excitation, the Ba${}_2$Ni${}_3$F${}_{10}$ nanowires exhibit three emission bands with peak positions locating at 360 nm, 530 nm, and 700 nm, respectively. Combined with the first-principles calculations, the photoluminescence property can be explained by the electron transitions between the t2g and eg orbitals. Clear hysteresis loops observed below the temperature of 60 K demonstrates the weak ferromagnetism in Ba${}_2$Ni${}_3$F${}_{10}$ nanowires, which has been attributed to the surface strain of nanowires. Exchange bias with blocking temperature of 55 K has been observed, which originates from the magnetization pinning under the cooling field due to antiferromagnetic core/weak ferromagnetic shell structure of Ba2Ni3F10 nanowires.

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• Restoring the density-gradient expansion for exchange in solids and surfaces
• Generalized gradient approximation for solids and their surfaces
• Ferromagnetic tendency at the surface of CE charge-ordered manganites
• Origin of ferroelectricity in the multiferroic barium fluorides BaMF4
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Cited by in corpus (1)

• BaMF${}_4$ (M = Mn, Co, Ni): New Electrode Materials for Hybrid Supercapacitor with Layered Polar Structure