Nanocrystalline magnetite thin films grown by dual ion-beam sputtering

Prieto, Pilar; Ruíz, Patricia; Ferrer, Isabel J.; Figuera, Juan de la; Marco, José F.

doi:10.1016/j.jallcom.2015.02.136

Cited by 7 publications

(1 citation statement)

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“…Thin films of spinel ferrites MFe2O4 (M = Mn, Cu, Zn, Ni, Co, Cd, etc.) exhibit excellent chemical stability and high corrosion resistivity and seem to be applicable as recording media and microwave absorbing layers [11]. Sutka [12] studied the electrical properties of Ni-Zn ferrite thin films deposited using spray pyrolysis.…”

Section: Introductionmentioning

confidence: 99%

Effects of Sintering Atmosphere on the Optical, Thermal and Electrical Properties of Inkjet Printed ZnxCu(1-x)Fe2O4 Thin Films

Hoong

2021

ARFMTS

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The effects of sintering atmosphere on the optical, thermal and electric properties of inkjet printed ZnxCu(1-x)Fe2O4 thin films have been investigated. The thin film samples were sintered separately in vacuum and oxygen. The obtained samples were then characterized by X-ray diffraction (XRD), optical band gap, electrical conductivity, Seebeck coefficient and thermal conductivity. XRD analysis showed that the fabricated samples have a cubic spinel structure of zinc copper ferrite regardless of the sintering atmosphere. The electrical conductivity of ZnxCu(1-x)Fe2O4 thin films sintered in oxygen was about 5 % higher compared to ZnxCu(1-x)Fe2O4 thin films sintered in vacuum. The optical band gap shows that the samples sintered in oxygen had smaller band gap compared to samples sintered in vacuum. The electronic band structure simulated through ABINIT shows ZnxCu(1-x)Fe2O4 is an indirect band gap material. A smaller electronic band gap was observed in O2 rich condition and was in agreement with the optical band gap and electrical conductivity test results. Seebeck coefficient of ZnxCu(1-x)Fe2O4 thin films sintered in oxygen remained positive , confirming charge transport by hole carries as p-type semiconductors. A change from p-type to n-type semiconductors was observed when ZnxCu(1-x)Fe2O4 thin films sintered in vacuum.

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Section: Introductionmentioning

confidence: 99%