Journal ArticleDOI
Magnetic properties of nano-size Ni synthesized by the pulsed wire evaporation (PWE) method
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In this article, NiO was synthesized by a pulsed wire evaporation (PWE) method, and its abnormal magnetic properties in a magnetic ordered state have been characterized using high and low magnetic fields.Abstract:
Nano-crystalline Ni has been synthesized by a pulsed wire evaporation (PWE) method, and its abnormal magnetic properties in a magnetic ordered state have been characterized using high and low magnetic fields. It was found that particles with the size ranges from 20 to 80 nm has a mean crystalline size of 40 nm which might influence the magnetic hysterisis behavior. Neutron powder diffraction (NPD) and saturation magnetization results indicate the antiferromagnetic NiO phase in prepared powder exist below the detection limit of 1 wt.%. The shifted hysterisis loop and irreversibility of magnetization in a high field were observed in the magnetic-ordered state of Ni. The initial magnetization curve for Ni is started to overlap the hysterisis loop at applied field of 750 Oe. This irreversibility in a high field can be explained by the non-collinear behavior and the existence of the metastable states of the magnetization at the surface layer (or core) of the particle in the applied magnetic field due to decrease of particle size.read more
Citations
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Structure and optical properties of nanocrystalline NiO thin film synthesized by sol–gel spin-coating method
TL;DR: In this paper, the structure of NiO thin film was investigated by means of X-ray diffraction (XRD) technique and scanning electron microscopy (SEM) in the spectral wavelength range of 300-800 nm.
Journal ArticleDOI
Surfactant-free dispersion of silver nanoparticles into MWCNT-aqueous nanofluids prepared by one-step technique and their thermal characteristics
TL;DR: In this paper, a significant enhancement in the thermal conductivity of silver-nanoparticle-based aqueous nanofluids with the addition of negligible amounts of multi-walled carbon nanotubes (MWCNTs) was reported.
Journal ArticleDOI
Synthesis of nickel and nickel oxide nanoparticles via heat-treatment of simple octanoate precursor
TL;DR: In this article, NiO nanoparticles have been synthesized via heat-treatment of a new precursor nickel octanoate Ni(octa) 2 ; (octa ǫ= octanoate); in the range of 400-900°C.
Journal ArticleDOI
Preparation of zno nanoparticles from [bis (acetylacetonato) zinc (ii)]–oleylamine complex by thermal decomposition
TL;DR: In this paper, the photoluminescence of ZnO nanoparticles was studied by exciting the sample with an ArF laser (193nm) and a strong blue-shift of the emission band was observed, suggesting a strong quantum size effect.
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Synthesis, structural and optical properties of ZnO and Ni-doped ZnO hexagonal nanorods by Co-precipitation method.
K. Raja,P. S. Ramesh,D. Geetha +2 more
TL;DR: EDS result showed that the amount of Ni in the product is about 9%, these Ni doped hexagonal nanorods exhibits a blue shifts and weak (UV) emission peak, compared with pure ZnO, which may be induced by the Ni-doping different concentrations.
References
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Book
Introduction to Magnetic Materials
B. D. Cullity,C. D. Graham +1 more
TL;DR: In this paper, the authors present materials at the practical rather than theoretical level, allowing for a physical, quantitative, measurement-based understanding of magnetism among readers, be they professional engineers or graduate-level students.
Journal ArticleDOI
Amorphous and nanocrystalline materials for applications as soft magnets
TL;DR: In this paper, the authors summarize the recent developments in the synthesis, structural characterization, properties, and applications of amorphous and nanocrystalline soft magnetic materials, including: kinetics and thermodynamics, structure, microstructure, and intrinsic and extrinsic magnetic properties.
Journal ArticleDOI
Noncollinear Spin Arrangement in Ultrafine Ferrimagnetic Crystallites
TL;DR: In this article, it was shown that the spin configuration differs from the N\'eel type found in large crystallites, and it was proposed that the ions in the surface layer are inclined at various angles to the direction of the net moment.
Journal ArticleDOI
Nanocrystalline metals crystallized from amorphous solids: nanocrystallization, structure, and properties
TL;DR: A review of the state of the art in this field can be found in this article, where the current status of research and developments on the nanocrystallization, microstructure and properties of the materials are summarized.
Journal ArticleDOI
Functionalization and applications of nanosized γ‐Fe2O3 particles
Qingxia Liu,Zhenghe Xu +1 more
TL;DR: In this paper, a method to prepare nanosized γ-Fe2O3 particles containing reactive thio and/or disulphide groups using molecular self-assembly method is described.