Effect of Zr substitution on the microstructure and magnetic properties of CuFeO2 ceramics

Hirata, Dai; Ye, Fengjiao; Li, Tao; Gong, Gaoshang; Gu, Liuting; Peng, Ke; Chen, Zhenping

doi:10.1007/s00339-018-2354-2

Cited by 11 publications

(2 citation statements)

References 27 publications

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“…The Raman peaks at 456 cm –1 are assigned to the E g (O–Cr–O bending) vibrational modes, and the result is similar to the reported CuFeO 2 . Besides, the peaks at around 576 cm –1 are probably caused by defects like interstitial oxygen atoms or Cu vacancies . The A 1g mode represents the vibrations of Cu–O bonds along the c -axis.…”

Section: Results and Discussionsupporting

confidence: 78%

Structural, Electronic Band Transition and Optoelectronic Properties of p-Type Transparent Conductive CuCr_1–xNi_xO₂ Semiconductor Films

Zhang

Han

et al. 2021

J. Phys. Chem. C

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The transparent conductive CuCr 1−x Ni x O 2 (0 ≤ x ≤ 8%) films were prepared by sol−gel method with two-step annealing process. The structure, morphology, phonon modes, chemical composition, optical bandgap, and electrical properties were systematically studied. It was found that the crystal quality improves first and then decreases with increasing the Ni content, and the inflection point occurs when the doping content is 2% and all samples have the (00l) preferred orientation. In the visible region, the transmittances of these samples range from 75% to 55% as the Ni dopant increases. On the basis of the theoretical calculation, we are inclined to the view that there are two ways of coexisting electronic transitions. The direct band gap decreases from 3.13 to 3.02 eV, and the indirect band gap decreases from 2.78 to 2.49 eV with increasing Ni content. Transmittance spectra of the CuCrO 2 film at the temperatures from 323 to 453 K present the fact that the absorption edge shows a slight redshift, which is due to the lattice thermal expansion and the electron−phonon interaction. Raman spectroscopy shows that Ni doping can substitute the Cr sites and further affect Cu−O bonds, which is caused by oxygen deficiency or a relatively smaller crystallite size. Moreover, it suggested that the nonlinear temperature dependence of phonon frequency and line width is a sign of nonharmonic lattice dynamics. The inherent anharmonic force from the crystal results in energy exchange between harmonic phonon normal modes, thereby promoting thermal balance, and in the lattice. The Cu cations have been confirmed to exist in the valence state of Cu 1+ , and all doped Ni cations exist in a positive divalent state by XPS. Hall effect measurement shows that the conductivities and carrier concentrations of the doped CuCr 1−x Ni x O 2 films can be improved by several orders of magnitude larger than that of undoped CuCrO 2 . The present work suggests that these well crystallized films without a secondary phase can be applied in future p-type optoelectronic devices.

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Section: Results and Discussionsupporting

confidence: 78%

Structural, Electronic Band Transition and Optoelectronic Properties of p-Type Transparent Conductive CuCr_1–xNi_xO₂ Semiconductor Films

Zhang

Han

et al. 2021

J. Phys. Chem. C

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“…For example, Dai et al performed magnetic measurements of prepared CuFe 1ÀX Zr X O 2 by using a PPMS. The temperature dependent magnetization (M-T) is recorded in the temperature range of 5-300 K under zero-field cooled (ZFC) conditions and a constant magnetic field of 0.5 T. The field dependent magnetization is recorded in a field variation of 0.5 T at 10 K and 13 K. Magnetic measurements show that the magnetic transition temperatures decrease with the increase in the Zr substitution amount, and all samples exhibit weak FM properties at 10 K and 13 K. 77 Aldirmaz et al measured the magnetism of the prepared CuZnAlNi and CuZnAlMn by using a PPMS. From a magnetic viewpoint, both CuZnAlNi and CuZnAlMn alloys exhibit paramagnetic behavior.…”

Section: Analysis Of Magnetic Materialsmentioning

confidence: 99%

Recent advances in electrospun magnetic nanofibers and their applications

Wang

Liu

et al. 2022

J. Mater. Chem. C

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The microdefects and enhanced electrochemical performances of nano-VO2(B) induced by Mg doping

Liu

Zhang

Chen

et al. 2022

J Solid State Electrochem

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Effect of Zr substitution on the microstructure and magnetic properties of CuFeO2 ceramics

Cited by 11 publications

References 27 publications

Structural, Electronic Band Transition and Optoelectronic Properties of p-Type Transparent Conductive CuCr_1–xNi_xO₂ Semiconductor Films

Structural, Electronic Band Transition and Optoelectronic Properties of p-Type Transparent Conductive CuCr_1–xNi_xO₂ Semiconductor Films

Recent advances in electrospun magnetic nanofibers and their applications

The microdefects and enhanced electrochemical performances of nano-VO2(B) induced by Mg doping

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Effect of Zr substitution on the microstructure and magnetic properties of CuFeO2 ceramics

Cited by 11 publications

References 27 publications

Structural, Electronic Band Transition and Optoelectronic Properties of p-Type Transparent Conductive CuCr1–xNixO2 Semiconductor Films

Structural, Electronic Band Transition and Optoelectronic Properties of p-Type Transparent Conductive CuCr1–xNixO2 Semiconductor Films

Recent advances in electrospun magnetic nanofibers and their applications

The microdefects and enhanced electrochemical performances of nano-VO2(B) induced by Mg doping

Contact Info

Product

Resources

About

Structural, Electronic Band Transition and Optoelectronic Properties of p-Type Transparent Conductive CuCr_1–xNi_xO₂ Semiconductor Films

Structural, Electronic Band Transition and Optoelectronic Properties of p-Type Transparent Conductive CuCr_1–xNi_xO₂ Semiconductor Films