Room temperature ferromagnetic ordering of NiO films through exchange coupling

Luo, Xi; Tseng, Li‐Ting; Li, S.; Yi, Jiabao

doi:10.1016/j.mssp.2014.10.009

Cited by 16 publications

(7 citation statements)

References 29 publications

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“…Interest in the magnetic properties of nanosized NiO has recently been revived due to reports of interesting and complex magnetic behavior [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. Although bulk NiO is antiferromagnetic, nanoparticles exhibit room-temperature coercivity, spin-glass behavior, superparamagnetism, memory effects, exchange bias effects and magnetic transitions at low temperature [17][18][19][20][21][22][23][24][25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Annealing-dependent structural and magnetic properties of nickel oxide (NiO) nanoparticles in a silica matrix

Nikolić¹,

Panjan²,

Blake³

et al. 2015

Journal of the European Ceramic Society

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Section: Introductionmentioning

confidence: 99%

Annealing-dependent structural and magnetic properties of nickel oxide (NiO) nanoparticles in a silica matrix

Nikolić¹,

Panjan²,

Blake³

et al. 2015

Journal of the European Ceramic Society

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“…Generally, one would ignore such small quantities of secondary minority phases, but since it is most likely that these phases reside on the surface of the films and in their grain boundaries (due to zone refining), they are very relevant for the present study where the transport in our films is strongly affected by these regions. In particular, as we shall see in the following, the magnetic properties of these phases [10][11][12][13] could play a role in explaining our transport results.…”

Section: X-ray Characterization Of the Filmsmentioning

confidence: 60%

Observation of Josephson-like Tunneling Junction Characteristics and Positive Magnetoresistance in Oxygen Deficient Nickelate Films of Nd0.8Sr0.2NiO3−δ

et al. 2021

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Nickelate films have recently attracted broad attention due to the observation of superconductivity in the infinite layer phase of Nd0.8Sr0.2NiO2 (obtained by reducing Sr doped NdNiO3 films) and their similarity to the cuprates high temperature superconductors. Here, we report on the observation of a new type of transport in oxygen poor Nd0.8Sr0.2NiO3−δ films. At high temperatures, variable range hopping is observed while at low temperatures a novel tunneling behavior is found where a Josephson-like tunneling junction characteristic with serial resistance is revealed. We attribute this phenomenon to coupling between superconductive (S) surfaces of the grains in our Oxygen poor films via the insulating (I) grain boundaries, which yields SIS junctions in series with the normal (N) resistance of the grains themselves. The similarity of the observed conductance spectra to the tunneling junction characteristic with Josephson-like current is striking, and seems to support the existence of superconductivity in our samples.

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“…Indeed, the magnetic properties shows a high dependency to the amendment of size and surface morphology. The good control of the nanoparticles form and shape remains so far a challenging task for researchers [12,13]. Earlier, an attempt has been made to eradicate this challenging task, NiO nanoparticles converted into multiphase nanocomposites with varied valent impurities.…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis and characterization of metal ions (Ce, Cu, Gd, Mn and Y) doped Nickel Oxide nanostructures for spintronic and photodiode applications

Marnadu¹,

Venkatesan²,

Alkallas³

et al. 2022

Phys. Scr.

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Multiphase hexagon and flower-shaped structures of NiO nanocomposites have been prepared with different metals ions (Ce, Cu, Gd, Mn and Y) using facile and low-cost co-precipitation method. The optical, structural, morphological, and magnetic properties of the synthesized nanostructures have been investigated. The XDR measurement reveal the coexistence of several crystal structures like cubic, monoclinic, tetragonal and orthorhombic which unveils the formation of polymorphism in the nanocomposites with high crystallinity. A wideband has been located in the FT-IR spectra at around 600 cm-1 revealing the metal oxide (M-O) phase formation. DRS exhibits four large and intense absorption bands at 260, 380, 420 and 720 nm in the UV and visible domains assigned to the nanocrystalline phases of NiO, CuO, CeO and MnO, respectively. SEM images of metal-doped nickel oxide nanocomposites show a white sponge, semi-spherical, flower-like, and hexagon-shaped particles of 15 nm size. TEM result establishes a smooth surface for samples grown from gadolinium and yttrium, contrary to other samples made off cerium and manganese demonstrate rough surface. A ferromagnetic tendency has been located for samples prepared from copper, manganese and gadolinium based NiO nanocomposites with coercivities of 132, 113 and 26 Oe, correspondingly. Photodiode characteristics were also investigated on the developed devices. These outcomes signify their use in spintronic and optoelectronic industries.

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Room temperature ferromagnetic ordering of NiO films through exchange coupling

Cited by 16 publications

References 29 publications

Annealing-dependent structural and magnetic properties of nickel oxide (NiO) nanoparticles in a silica matrix

Annealing-dependent structural and magnetic properties of nickel oxide (NiO) nanoparticles in a silica matrix

Observation of Josephson-like Tunneling Junction Characteristics and Positive Magnetoresistance in Oxygen Deficient Nickelate Films of Nd0.8Sr0.2NiO3−δ

Facile synthesis and characterization of metal ions (Ce, Cu, Gd, Mn and Y) doped Nickel Oxide nanostructures for spintronic and photodiode applications

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