Sentences with phrase «spin wave»

But the investigation of the dynamics of spin waves in one - dimensional quantum magnets is also relevant for potential applications.

Also, spin wave devices are compatible with conventional electronic devices and can be integrated within a chip.

The collective motions of the ensemble of spins are called spin waves.

A device based on spin waves could theoretically operate more efficiently than ordinary electronic circuits.

They observed that the application of a sufficiently large magnetic field to this material suppressed spin waves associated with the long - range order, and drove it to an unusual excited state.

While the standard linear spin wave theory says that magnons and phonons vibrate forever and do not influence each other, a coupling would make phonons and magnons unstable, and allow an otherwise forbidden decay.

The standard linear spin wave theory presumes that the vibration of magnons and phonons is harmonic and stable over time, like the oscillation of a spring without friction.

Now scientists at Nobel laureate Eric Cornell's lab at the University of Colorado have taken the first pictures of spin waves as they undulate through space.

Bart van Wees and his PhD student Ludo Cornelissen, both from the University of Groningen and FOM workgroup leader dr. Rembert Duine from Utrecht University have succeeded to use spin waves in an electric circuit by carefully designing the device geometry.

The main challenge associated with magnonic holographic memory is the scaling of the operational wavelength, which requires the development of sub-micrometer scale elements for spin wave generation and detection.

The UCLA researchers were able to demonstrate that using this multiferroic material to generate spin waves could reduce wasted heat and therefore increase power efficiency for processing by up to 1,000 times.

It takes about 100 nanoseconds for recognition, which is the time required for spin waves to propagate and to create the interference pattern.

NiO is a promising material for spintronic devices, where signals are transmitted not by electrical currents but rather by spin waves, consisting of propagating disturbances in the ordering of magnetic materials, in a domino - like fashion.

When heat or a current is applied to the solid, the electrons» compasses get repositioned, creating a magnetic spin wave that ripples through the solid.

The findings may prove beneficial in the emerging field of spintronics, which seeks to channel the energy from spin waves generated by electrons to create smaller, more energy - efficient computers and electronic devices.

«Quantum drag: Physicist says current in one iron magnetic sheet can create quantized spin waves in another, separate sheet.»

«We hope that our results will contribute to better understanding of mechanisms of spin wave interactions with the crystal lattice vibrations, and energy loss channels in nickel oxide devices,» Balandin said.

A couple of months ago, in a similar experimental set - up, the Bloch group were able to change the spin - direction of one individual atom and to track the propagation of the resulting spin wave throughout the quantum magnet.

«One possible reason for this is that the fragile spin waves couple to some extent to thermal excitations.

Spin waves transmit these perturbations in the material.

The findings, which have been submitted to Physical Review Letters for publication, demonstrate that by tweaking magnetic field strength and cloud density the researchers can control how spin waves evolve and take snapshots of every stage.

To observe spin waves, McGuirk and physicists Heather Lewandowski and Dave Harber started with a cloud of rubidium atoms chilled to fractions of a degree above absolute zero.

«Spin waves open an opportunity to realize fundamentally new ways of computing while solving some of the key challenges faced by scaling of conventional semiconductor technology, potentially creating a new paradigm of spin - based electronics,» Wang said.

The latest signal from the gravitational wave detector backs up Einstein's theory of general relativity and gives more clues on how black holes get their spin

The work builds upon findings published last year by the researchers, who showed a 2 - bit magnonic holographic memory device can recognize the internal magnetic memory states via spin wave superposition.

The uniqueness of the demonstrated work is that the input patterns are encoded into the phases of the input spin waves.

Then spin waves propagate through the magnetic matrix and interfere.

Magnons, electron spin waves, can be controlled by a magnetic field.

«This jumbly kind of spin wave broke down into many other waves, because everything is collective, everything is entangled,» Mourigal said.

Ill. / ©: Joel Cramer Thermally excited spin waves carry a spin current from the ferromagnet (YIG in this case) into the metal layer.

In condensed matter physics, Dyson also did studies in the phase transition of the Ising model in 1 dimension and spin waves [11] Dyson was awarded the Lorentz Medal in 1966 and Max Planck medal in 1969.

Beyond that, there's a wide range of even more exotic research under way — quantum computing, DNA computing, spin wave devices, exitonic field - effect transistors, spin torque majority gates, bilayer pseudospin field - effect transistors, and more.

«First realization of an electric circuit with a magnetic insulator using spin waves.»

«Initially we used the simplest model, which is the linear spin wave theory without a coupling, but we realised that it was like the classic case of putting the elephant in the fridge: You can somehow do it, but the numbers become unrealistic and there is something wrong with it,» explains professor Park Je - Geun.

This single crystal, inelastic neutron scattering work, carried out from 2008 to 2012, was among the first to fully characterize a four dimensional data set of S (Q, E)(three Q dimensions, one energy dimension) to fit the high magnetic field spin excitation spectrum to linear spin wave theory.

In the theoretical case studied by Flatté, the disturbance to the solid excites magnons in one layer that then exert influence on the other layer, creating a spin wave in the other layer, even though it is physically separate.

The repositioning creates a spin wave, shown by the dotted line.

These spin waves are being studied for potential use in microelectronics.

Unlike conventional electronic transistors, spintronic devices encode and communicate information, not with the electric currents, but rather with the spin currents or spin waves.

The spin waves that the researchers send into the YIG are detected by the platinum strip on the other side of the YIG.

The circuit is realized using spin waves: wave - like perturbations in the magnetic properties of a material.

The spin wave circuit that the researchers built, consists of a 200 nanometre thin layer of yttrium iron garnet (a mineral and magnetic insulator, YIG in short), with a conducting platinum strip on top of that on both sides.

This causes a local magnetisation direction, generating a spin wave in the YIG.

This allows them to make use of the spin waves that are already present in the material due to thermal fluctuations, which requires a much smaller disturbance of the system and hence enables the spin waves to be used in an electric circuit.

A spin wave is caused by a perturbation of the local magnetisation direction in a magnetic material.

In a magnetic insulator, a spin wave is used instead.

So far, electrical circuits based on spin waves have not been realised, since it turned out to be impossible to introduce a perturbation in the system large enough to create spin waves.

The detection process is exactly opposite to the spin wave injection: a spin wave collides at the interface between YIG and platinum, and transfers its spin to an electron in the platinum.

Researchers have known for some time that atoms can perform a bizarre trick called a spin wave — the quantum equivalent of a sports audience's «wave» — by varying the directions in which their magnetic fields rotate.

(The image on the left shows a spin wave in a rubidium gas parallel to an external magnetic field; the picture on the right shows the spin wave perpendicular to an external magnetic field.