Use the junction of collinear nickel oxide insulators to generate spin-polarized current

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Nickel oxide overview Compounds with the chemical name NiO are compounds containing nickel (II). It is the principal oxide of Nickel. Nickel oxide, a thermally stable, highly insoluble source of nickel, is suitable for applications such as glass, ceramics, and optical materials. Nickel oxide, the main nickel oxide, is a green solid. Every year, millions of kilos of nickel oxide powder (NiO) with high purity (99.999%), are produced. Oxide doesn’t conduct electricity.

Certain oxides of the perovskite structural have conductivity on the cathodes for solid oxide fuel cell and oxygen generation systems. Compounds containing one or more metal cations and at least one oxygen ion. These compounds are stable and insoluble in aqueous solution (water). They can be used for ceramic structures and even for the production of simple clay bowls to house advanced electronic devices.

Metal oxides react with acids, strong reducing substances and sputtering targets in redox reaction. Nickel oxide can be produced as powders, particles, sputtering sputtering, tablets, or nanopowders. Nickel oxide can usually be obtained immediately in many cases. Nickel oxide in high purity, nanopowder and submicron forms are possible.

What uses does nickel oxide have?
Nickel oxide can be used for electrical ceramics like thermistors or varistors. As a ceramic, glass and glaze pigment, ferrite (nickelzinc ferrite), can be used.
NiO can be used for a number of professional purposes. In general, “chemical grade” is distinguished from “metallurgical quality”. Chemical grade is a relatively purified material that is used in special applications. “Metallurgical grade”, on the other hand, is primarily used to create alloys. It is used by the ceramics industry to make glass, ferrite, and enamel. It is used in the production of nickel steel alloys. Charles Edouard Guillaume received the 1920 Nobel Prize in Physics in recognition of his research on nickel steel alloys he named Invar and Irenevar.

NiO, or hole transport material, is used in thin-film photovoltaic cells. NiO is also used in the manufacture of nickel-iron battery (also called Edison batteries) as well as fuel cells. It is also the precursor to a number of nickel salts used in specialty chemicals and as catalysts. NiO has been used for many years to produce NiCd rechargeable battery used in electronic devices. In complementary electrochromic devices, NiO is used as anode electrode instead of tungsten dioxide (cathode electrode).

About 4,000 tons of chemical-grade NiO are produced annually. Black NiO, formed from mineral acid treatment, is the precursor to nickel sal. NiO can be used as a hydrogenation catalyst.

The reduction of nickel oxide to metallic Nickel can be achieved by heating with hydrogen or carbon. When heated to high temperatures (>700degC), nickel oxide can be combined with sodium and potassium oxides to produce corresponding nickelates.

Is nickel oxide soluble in water?
Nickel oxide dissolves in ammonium hydroxide, potassium cyanide, and acid. It is insoluble with hot and cold water as well as a caustic solution.

Use collinear nickel-oxide insulators in conjunction to generate spin-polarized voltage

The antiferromagnetic material has shown great promise in spintronics because it is resistant to magnetic field disturbances. It also does not produce stray fields and possesses ultra-fast dynamic. It is difficult, however, to generate and manipulate the spin-polarized currents of such materials due to their symmetry. The use of Nickel Oxide may help overcome the limitation.
We have constructed a prototype junction consisting of a gold-nickel-gold-gold junction, in which a collinear nickel oxide insulator can destroy the spin sublattice symmetry using an external bias voltage. A system like this demonstrates spin-polarized currents when it induces non-equivalent transmittal of spin up and spin down currents.

Zhang Xianmin said, “Because of the symmetry between the spin sublattice and the collinear antiferromagnetic material, it was long believed that spin polarized current could not be achieved.” We demonstrate that by applying a bias voltage to the antiferromagnetic antiferromagnetic materials, the spin sublattice symmetry can be broken. This leads to a spin polarized current.
This work demonstrates a method to reduce the large resistance mismatch which prevents spin injections from the metal electrode onto the semiconductor. It will be easier to combine spintronics with semiconductor electronic.
By changing the bias voltage, the team could not only adjust the amplitude but also the direction of spin polarization. The system can achieve 80% positive spin-polarization by using a bias voltage around 0.9 Volts. However, negative spin-polarization requires a voltage above 1.6 Volts.
Zhang hopes that his findings will pave a way for new antiferromagnetic spinning devices and he hopes to continue exploring such materials.
Is Nickel Oxide Acidic or Alkaline
Unless stated otherwise, the data provided on materials is at standard conditions. (At 25degC, 77degF and 100kPa). Nickel hydroxide, also known as NiO(OH), is an inorganic chemical compound. It is an insoluble black solid that will not dissolve in any solvent. However, it can be attacked by alkalis or acids.

Is nickel oxide magnetic?
Solution-growth method is used to produce branched nanocrystals of nickel oxide with a narrow size distribution. Magnetic characterization results show that NiO Nanocrystals less than 12.8 nm in size exhibit a weak ferromagnetic phase at room temperatures due to spins uncompensated.

UiTM electrical engineers’ innovative nickel oxide nano carnation packaging won the MTE 2020 gold award and International Merit Award.

A Malaysia Technology Expo (MTE 2020) gold medalist was the electrical engineering lecturer from Teknologi MARA University Malaysia. Their project is titled “Humidity Sensing Based on New Nickel-Oxide Nano-Carnation Synthesized By Low-Temperature Infusion Method”. Dr. Assoc. Mohamad Hassan Mamat was also awarded the International Merit Award at the 2020 Malaysia Technology Expo.

The present invention proposes a manufacturing method for a cheap humidity sensor that is based on nickel-oxide nanostructures. The sensor produced has a high sensitivity for water molecules or humidity. You can manufacture sensors using the solution-immersion method at low temperatures.

MTE has been held annually in Malacca Malaysia since 2001. It is now one of the largest international invention shows. This year MTE is being managed by PROTEMP Group and University of Malacca Malaysia. SIRIM Tech Venture Sdn Bhd. It is the subsidiary of SIRIM Berhad that provides commercial service for innovations created by R&D activities in Malaysia. Over 500 local and foreign inventions were showcased during the three day exhibition.

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