Reading and controlling nuclear spin on plastic electronic devices at room temperature

Researchers from the University of Utah have managed to control and read spin information at room temperatures. For this experiment, they used an orange OLED device.

The researchers were able to read the nuclear spins of two hydrogen isotops: a single proton and deuterium (a proton, neutron and electron). When the researchers controlled the spin, they controlled the electrical current in the device.

Heusler alloys shown to have 100% spin polarization

Researchers from the Johannes Gutenberg University Mainz (JGU) managed to directly observe the 100% spin polarization of a Heusler compound. A Heusler alloy is made from several metallic elements arranged in a lattice structure, and the researchers used the compound Co2MnSi. This paves the way towards using Heusler materials for spintronics devices.

Spin polarization is the degree of parallel orientation of the spins of the electrons that transport the charge. The ideal spintronics material has the maximum possible spin polarization. The Heusler alloy used in this material was shown to have an almost complete spin polarization at room temperature.

New thermoelectric spintronics devices can turn heat into electricity

Researchers from the University of Utah developed Spintronics devices that can convert heat into electricity. Those thermoelectric devices work at room temperature and don't require a continuous external magnetic field.

Those devices (that can convert even minute heat to electricity) function on a concept known as spin-caloritronics, in which thermal and electrical transport occurs in different parts of the device.

Researchers manage to switch robust ferromagnetism close to room temperature by using low electric fields

Researchers from Germany, France and the UK managed to switch on and off robust ferromagnetism close to room temperature by using low electric fields. They hope such work will lead to applications in low-power Spintronics devices.

The researchers used a ferroelectric BaTiO3 substrate and covered it with a thin film of magnetic FeRh. They then demonstrated how the magnetic order of the sample changes dramatically, when a moderate external electric field is applied

Magnetic graphene at room temperature demonstrated

Researchers from UC Berkeley, Florida International University (FIU) and the Georgia Institute of Technology demonstrated for the first time the presence of magnetic properties in graphene nanostructures at room temperature. This could lead towards Spintronics applications.

To achieve this they functionalized the graphene with nitrophenyl. The researchers thus confirmed the presence of magnetic order in nanoparticle-functionalized graphene. The graphene was epitaxially grown at Georgia Tech, chemically functionalized at UC Riverside and studied at FIU and UC Berkeley.

Antiferromagnetic Tetragonal CuMnAs hold promise for future Spintronics and nanoelectronic devices

Researchers from the University of Nottingham are studying a new antiferromagnetic spintronic material - tetragonal CuMnAs. They say that this new material enables new device structure designs that combine Spintronic and nanoelectronic functionality - at room temperature.

An antiferromagnet is a material in which electron spin on adjacent atoms cancel each other out - and so it was considered unsuitable for Spintronics applications. However it was recently discovered that these materials have a physical phenomena that can enable memory and sensing applications.

Manganese and Gallium Nitride given a second chance as Spintronics materials

A combination of Manganese and Gallium Nitride was once a promising spintronics material, but it was later abandoned when it was found that these two materials aren't harmonious. But now researchers from Ohio university (in collaboration with Argentinian and Spanish researchers) developed a way to incorporate a uniform layer (at least on the surface) from the materials.

The researchers used the nitrogen polarity of gallium nitride (old experiments used the gallium polarity) to attach to the manganese, and they also heated the sample which prevents the manganese atoms from "floating" on the outer layer of gallium atoms and instead made the connection that created the manganese-nitrogen bond.

Fullerene used to preserve electron spin over long distances

Researchers from Tohoku University have shown that electron spins can be preserved for long distances using optimized organic compounds. This is because organic compounds are made mostly from carbon, in which the spin–orbit interaction is quite small. Using fullerene (C60) films the researchers made devices in which electrons traveled up to 110 nm at room temperature while preserving their spin.

The researchers used fullerence because there's no hydrogen in it (common in other organic materials) and this helps reduce the hyper fine interactions between electron and nuclear spins that can induce spin-flipping events. They built an organic spin valve in which two ferromagnetic electrons are placed in contact with an organic layer.

A new spin amplifier can be used at room temperatures

Researchers from Sweden, Germany and the US managed to develop an effective spin amplifier based on a non-magnetic semiconductor - that works at room temperature. The amplification occurs through deliberate defects in the form of extra gallium atoms introduced into an alloy of gallium, indium, nitrogen and arsenic.

Such a device can be used along a path of spin transport to amplify signals that have weakened along the way. By combining this with a spin detector, it may be possible to read even extremely weak spin signals.

New plastic-based spintronics magnetic field sensor developed, is "dirt cheap"

Researchers from the University of Utah developed a Spintronics organic thin-film transistor that can be used as a cheap magnetic field sensor that never needs to be calibrated and is capable of detecting intermediate to strong magnetic fields. The film also resists heat and degradation and operates at room temperatures.

The thin film is an organic semiconductor polymer called MEH-PPV - a very cheap material. In fact the researchers say that this new sensor is "dirt cheap" - it costs just as little as a drop of regular paint. The researchers are thinking about launching a spin-off company to commercialize this technology.