Shape-controlled magnetic nanoplatelets of Ni-doped ZnO synthesized via a chemical precursor

Jadhav, J.; Biswas, Somnath

doi:10.1016/j.jallcom.2015.12.191

Cited by 35 publications

(6 citation statements)

References 70 publications

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“…As the Ni 2+ ion radius is smaller than the Zn 2+ ion radius, the residual stress generated during the crystallization process results in an increased mutual repulsion between the Ni 2+ ion polarization charges, the system energy rises and so triggers the volume increase. The observed expansion in volume V 0 has also been found in nanoplatelets of Ni-doped ZnO [ 27 ] and Ni- and Co-doped ZnO [ 28 ]. Moreover, for configuration III and configuration IV, the calculated lattice constants showed a good consistency with the 2 × 2 × 2 supercell, and four configurations of Ni-doped ZB ZnO were approximate to the experimental value [ 23 ], the calculated relative error was less than 2%.…”

Section: Resultsmentioning

confidence: 66%

Electronic and Magnetic Properties of Ni-Doped Zinc-Blende ZnO: A First-Principles Study

Xue

Zhang

et al. 2018

Nanomaterials

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The electronic structure, band structure, density of state, and magnetic properties of Ni-doped zinc-blende (ZB) ZnO are studied by using the first-principles method based on the spin-polarized density-functional theory. The calculated results show that Ni atoms can induce a stable ferromagnetic (FM) ground state in Ni-doped ZB ZnO. The magnetic moments mainly originate from the unpaired Ni 3d orbitals, and the O 2p orbitals contribute a little to the magnetic moments. The magnetic moment of a supercell including a single Ni atom is 0.79 μB. The electronic structure shows that Ni-doped ZB ZnO is a half-metallic FM material. The strong spin-orbit coupling appears near the Fermi level and shows obvious asymmetry for spin-up and spin-down density of state, which indicates a significant hybrid effects from the Ni 3d and O 2p states. However, the coupling of the anti-ferromagnetic (AFM) state show metallic characteristic, the spin-up and spin-down energy levels pass through the Fermi surface. The magnetic moment of a single Ni atom is 0.74 μB. Moreover, the results show that the Ni 3d and O 2p states have a strong p-d hybridization effect near the Fermi level and obtain a high stability. The above theoretical results demonstrate that Ni-doped zinc blende ZnO can be considered as a potential half-metal FM material and dilute magnetic semiconductors.

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Section: Resultsmentioning

confidence: 66%

Electronic and Magnetic Properties of Ni-Doped Zinc-Blende ZnO: A First-Principles Study

Xue

Zhang

et al. 2018

Nanomaterials

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“…The absorption peak (known as excitonic absorption peak) of pure ZnO and Ni doped ZnO (5%, 10% and 15%) nanoparticles were observed in the wavelength around 376 nm, 380 nm, 375 nm and 370 nm, respectively. The absorption peak of pure ZnO is shifted to higher wavelength once ZnO is doped with 5% Ni similar to (Jadhav et al, 2016). It is also mentioned in the literature (Guruvammal et al, 2016) that one reason for red shift could be the sp-d exchange interactions between the band electrons and the localized d-electrons of the Ni 2+ ions.…”

Section: Microstructure Analysis Of Zno and Ni:zno Nanoparticlesmentioning

confidence: 57%

“…There are also some other studies about Ni doped ZnO using sol-gel method (Srinet et al, 2013;Liu et al, 2014), low temperature hydrothermal method (Xu et al, 2016), low temperature wet chemical method (Rana et al, 2016) and about shape controlled magnetic nanoplatelets of Ni doped ZnO (Jadhav et al, 2016). The crystallographic structure and morphology of Ni doped ZnO, and further physical properties, are affected by preparation technique and external conditions such as concentration of Ni, reaction temperature, reaction time, annealing temperature, pH value, starting precursors, solution concentration, and etc.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Effect of Nickel Concentration on Crystallographic Structure and Morphology of Zinc Oxide Nanopowders

Erat

Yıldırımcan

2019

Turkish Journal of Engineering

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In this study, we work on the effect of Ni doping on the crystallographic structure, morphology, and optical properties of ZnO nanoparticles. ZnO and Ni doped ZnO nanopowders were synthesized by sol-gel technique with different Ni concentration (5%, 10%, and 15%). The crystallographic structure was characterized by conventional X-ray Diffraction (XRD) technique. The results confirm that Ni doping does not change the single hexagonal phase existing in pure ZnO whereas in high Ni doping concentration (10% and 15%) causes to grow a secondary phase due to presence of NiO. FE-SEM, EDX, FTIR techniques are used for morphology, elemental, and chemical analyses of the samples. Optical properties of the samples are investigated by using UV-VIS spectrophotometer.

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“…ZnO didop Ni bersifat ferromagnetik, ini sudah dilaporkan oleh (Pala, et. at., 2015;Jeevan et al ., 2015;Shindeet al ., 2014;Liu et al, 2014;Gunjan et. al ., 2013) sifat ferromagnetik terbentuk karena sebagian ion Ni 2+ mensubstitusi ion Zn 2+ dalam kisi ZnO adanya interaksi pertukaran antara elektron daerah spin-terpolarisasi dari Ni 2+ dan elektron konduksi atau pembawa muatan bebas yang disebabkan interaksi ferromagnetik.…”

Section: Hasil Dan Pembahasanunclassified

PENGARUH DOPAN Ni TERHADAP KARAKTERISTIK LISTRIK DAN MAGNETIK PADA ZnO YANG DISINTESIS DENGAN METODE SOLID STATE REACTION

2019

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AbstrakZnO yang memiliki stabilitas kimia serta energi thermal yang tinggi merupakan material non magnetik dan ion Ni yang merupakan salah satu golongan transisi metal yang memiliki sifat magnetik. Kombinasi antara ion Zn 2+ dan ion Ni 2+ akan menghasilkan material ferromagnetik serta mengakibatkan munculnya perubahan karakteristik listrik dan magnetik. Zn1-xNixO (x =0, 0.01, 0.03 dan 0.05) telah disintesis dengan menggunakan teknik Solid-state reaction. Serbuk ZnO dan NiO dimixer dan di miling dengan menggunakan high speed shaker mill. Pengaruh dari dopan Ni terhadap sifat listrik dan magnetik telah diinvestigasi dengan menggunakan I-V dan C-V serta VSM. Pengukuran resistivitas, konduktivitas dan konstanta dielektrik dengan menggunakan I-V dan C-V meter, diperoleh resistivitas sampel Zn1-xNixO(x = 0, 0.01, 0.03 dan 0.05) sebesar (3.44 x 10 5 ohm.m, 3.54 x 10 5 ohm.m, 3.91 x 10 5 ohm.m dan 4.80 x 10 5 ohm.m) . Resistansi yang naik mengindikasikan bahwa perbedaan antara jari-jari ion Zn 2+ dan ion Ni 2+ menyebabkan internal stress pada sistem kisi ZnO yang sehingga mengakibatkan cacat pada batas butir (grain boundaries). Konstanta dielektrik sampel Zn1-xNixO(x = 0, 0.01, 0.03 dan 0.05) sebesar (13, 28.36, 34.81 dan 47.55). Konstanta dielektrik yang meningkat diakibatkan karena dengan meningkatnya komposisi dopan, yang diindikasikan Ni 2+ dapat menempati posisi pada pusat Zn 2+ , yang mengarah ke daerah dipol listrik permanen yang menunjukkan perilaku dielektrik. Hasil karakterisasi VSM untuk melihat sifat magnet sampel Zn1-xNixO menunjukkan sifat ferromagnetik pada seluruh sampel. AbstractZnO with high chemical stability and thermal energy is a non magnetic material and Ni ion which is one of the metal transition groups that has magnetic properties. The combination of Zn 2+ ions and Ni 2+ ions will produce ferromagnetic material and affected material electrical and magnetic characteristics. Zn1-xNixO (x = 0, 0.01, 0.03 and 0.05) has been synthesized using the Solid-state reaction technique. ZnO and NiO powders were mixed and miled using high speed shaker mill. The effect of Ni dopants on electrical and magnetic properties was investigated using I-V and C-V and VSM. Zn1-xNixO (x = 0, 0.01, 0.03 and 0.05) resistivity characteristic was (3.44 x 10 5 ohm.m, 3.54 x 10 5 ohm.m, 3.91 x 10 5 ohm.m dan 4.80 x 10 5 ohm.m). The increasing of resistance properties indicated by the difference of ion Zn 2+ and ion Ni 2+ radius. The ions radius difference causes internal stress of ZnO lattice system which causes grain boundaries. Zn1-xNixO (x = 0, 0.01, 0.03 and 0.05) electric constant properties was

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Shape-controlled magnetic nanoplatelets of Ni-doped ZnO synthesized via a chemical precursor

Cited by 35 publications

References 70 publications

Electronic and Magnetic Properties of Ni-Doped Zinc-Blende ZnO: A First-Principles Study

Electronic and Magnetic Properties of Ni-Doped Zinc-Blende ZnO: A First-Principles Study

Comparison of Effect of Nickel Concentration on Crystallographic Structure and Morphology of Zinc Oxide Nanopowders

PENGARUH DOPAN Ni TERHADAP KARAKTERISTIK LISTRIK DAN MAGNETIK PADA ZnO YANG DISINTESIS DENGAN METODE SOLID STATE REACTION

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