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Heat makes electrons’ spin in magnetic superconductors

April 24, 2015 9:53 am | by Academy of Finland | News | Comments

Physicists have shown how heat can be exploited for controlling magnetic properties of matter. The finding helps in the development of more efficient mass memories. The result was published in Physical Review Letters. The international research group behind the breakthrough included Finnish researchers from the University of Jyväskylä and Aalto Univ.

Giant magnetic effects induced in hybrid materials

April 20, 2015 2:22 pm | by Department of Energy, Office of Science | News | Comments

Proximity effects in hybrid heterostructures, which contain distinct layers of different...

Applied physics helps decipher the causes of sudden death

April 20, 2015 2:10 pm | by Universitat Politècnica de Catalunya (UPC) | News | Comments

Sudden cardiac death accounts for approximately 10 percent of natural deaths, most of which are...

SESAME passes an important milestone at CERN

April 8, 2015 1:57 pm | by CERN | News | Comments

The SESAME project has reached an important milestone: the first complete cell of this...

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Frustrated magnets: New experiment reveals clues to their discontent

April 6, 2015 8:12 am | by Catherine Zandonella, Princeton Univ. | News | Comments

An experiment conducted by Princeton Univ. researchers has revealed an unlikely behavior in a class of materials called frustrated magnets, addressing a long-debated question about the nature of these discontented quantum materials. The work represents a surprising discovery that down the road may suggest new research directions for advanced electronics.

Physicists solve low-temperature magnetic mystery

March 27, 2015 8:19 am | by Chelsea Whyte, Brookhaven National Laboratory | News | Comments

Researchers have made an experimental breakthrough in explaining a rare property of an exotic magnetic material, potentially opening a path to a host of new technologies. From information storage to magnetic refrigeration, many of tomorrow's most promising innovations rely on sophisticated magnetic materials, and this discovery opens the door to harnessing the physics that governs those materials. 

Magnetic brain stimulation

March 13, 2015 7:54 am | by David L. Chandler, MIT News Office | Videos | Comments

Researchers at Massachusetts Institute of Technology have developed a method to stimulate brain tissue using external magnetic fields and injected magnetic nanoparticles: a technique allowing direct stimulation of neurons, which could be an effective treatment for a variety of neurological diseases, without the need for implants or external connections.

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Magnetic material attracts attention for cancer therapy

March 5, 2015 9:23 am | by Monash Univ. | News | Comments

An extraordinary self-regulating heating effect that can be achieved in a particular type of magnetic material may open the doors to a new strategy for hyperthermia cancer treatment. Temperatures that can be tolerated by healthy body cells have long been known to destroy cancerous cells. An approach that uses magnetic particles introduced into tissue and heated remotely has found some success in treating cancer. 

Researchers make magnetic graphene

January 26, 2015 10:22 am | by Univ. of California, Riverside | News | Comments

Graphene has many desirable properties. Magnetism alas is not one of them. Magnetism can be induced in graphene by doping it with magnetic impurities, but this doping tends to disrupt graphene's electronic properties. Now a team of physicists at the Univ. of California, Riverside has found an ingenious way to induce magnetism in graphene while also preserving graphene's electronic properties.

Structure control unlocks magnetization, polarization simultaneously

January 26, 2015 7:53 am | by Univ. of Liverpool | News | Comments

Scientists at the Univ. of Liverpool have controlled the structure of a material to simultaneously generate both magnetization and electrical polarization, an advance which has potential applications in information storage and processing. The researchers demonstrated that it's possible to unlock these properties in a material which initially displayed neither by making designed changes to its structure.

Researchers develop multiferroic materials, devices integrated with silicon chips

January 13, 2015 10:59 am | by Matt Shipman, News Services, North Carolina State Univ. | News | Comments

A research team led by North Carolina State Univ. has made two advances in multiferroic materials, including the ability to integrate them on a silicon chip, which will allow the development of new electronic memory devices. The researchers have already created prototypes of the devices and are in the process of testing them. Multiferroic materials have both ferroelectric and ferromagnetic properties.

Researchers create, control spin waves

November 18, 2014 7:50 am | by James Devitt, New York Univ. | News | Comments

A team of New York Univ. and Univ. of Barcelona physicists has developed a method to control the movements occurring within magnetic materials, which are used to store and carry information. The breakthrough could simultaneously bolster information processing while reducing the energy necessary to do so.

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New evidence for exotic, predicted superconducting state

October 27, 2014 12:35 pm | News | Comments

A research team led by a Brown Univ. physicist has produced new evidence for an exotic superconducting state, first predicted a half-century ago, that can arise when a superconductor is exposed to a strong magnetic field. This new understanding of what happens when electron spin populations become unequal could have implications beyond superconductivity.

High field magnet exceeds expectations with 26-T test

October 24, 2014 9:30 am | News | Comments

Certain quantum physical phenomena in matter can only be clearly visualized in the presence of extreme magnetic fields. Physicists in Germany are developing a new high field magnet based on a hybrid design conceived in the U.S. On Oct. 16, 2014, scientists with the High Field Magnet project reported consistent magnetic fields of 26 T, higher than 25-T goal originally conceived.

Cooling to near absolute zero with magnetic molecules

October 23, 2014 12:56 pm | News | Comments

An international team of scientists have become the first to successfully reach temperatures below -272.15 C, which is just above absolute zero, using magnetic molecules. The effort, which avoids the use of helium, depends on a form of gadolinium that appropriately has a structure resembling a snowflake.

Magnetic mirrors enable new technologies by reflecting light in uncanny ways

October 16, 2014 10:18 am | News | Comments

As in Alice’s journey through the looking-glass to Wonderland, mirrors in the real world can sometimes behave in surprising and unexpected ways, including a new class of mirror that works like no other. Scientists have demonstrated, for the first time, a new type of mirror that forgoes a familiar shiny metallic surface and instead reflects infrared light by using an unusual magnetic property of a non-metallic metamaterial.

A new dimension for integrated circuits: 3-D nanomagnetic logic

September 30, 2014 1:39 pm | News | Comments

Electrical engineers in Germany have demonstrated a new kind of building block for digital integrated circuits. Their experiments show that future computer chips could be based on 3-D arrangements of nanometer-scale magnets instead of transistors. In a 3-D stack of nanomagnets, the researchers have implemented a so-called “majority” logic gate, which could serve as a programmable switch in a digital circuit.

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Magnetic field opens and closes nanovesicle

September 24, 2014 9:18 am | Videos | Comments

Researchers in the Netherlands have managed to open nanovesicles in a reversible process and close them using a magnet. Previously, these vesicles had been “loaded” with a drug and opened elsewhere using a chemical process, such as osmosis. The magnetic method, which is repeatable, is the first to demonstrate the viability of another method.

Oxides discovered by chemists could advance memory devices

September 17, 2014 1:35 pm | News | Comments

Combining materials that exhibit magnetic and ferroelectric properties could be a boon for electronics designs, revolutionizing logic circuits and jumpstarting spintronics. This task has proven difficult until a recently developed inorganic synthesis technique, created by chemists at The City College of New York, produced a new complex oxide that demonstrate both properties.

Magnetism intensified by defects

September 12, 2014 1:53 pm | News | Comments

As integrated circuits become increasingly miniaturized and the sizes of magnetic components approach nanoscale dimensions, magnetic properties can disappear. Scientists in Japan, with the help of a form of electron microscopy called split-illumination electron holography, have gained important insights into the development of stable, strong nanomagnets by discovering magnetism-amplifying atomic disorder in iron-aluminum alloys.

Magnetic nanocubes self-assemble into helical superstructures

September 5, 2014 7:46 am | by Jeanne Galatzer-Levy, Univ. of Illinois, Chicago | News | Comments

Materials made from nanoparticles hold promise for myriad applications. The challenge in creating these wonder materials is organizing the nanoparticles into orderly arrangements. Nanoparticles of magnetite, the most abundant magnetic material on earth, are found in living organisms from bacteria to birds. Nanocrystals of magnetite self-assemble into fine compass needles in the organism that help it to navigate.

Moore quantum materials: Recipe for serendipity

August 18, 2014 7:44 am | by Mike Williams, Rice Univ. | News | Comments

Thanks to a $1.5 million innovation award from the Gordon and Betty Moore Foundation, Rice Univ. physicist Emilia Morosan is embarking on a five-year quest to cook up a few unique compounds that have never been synthesized or explored. Morosan is no ordinary cook; her pantry includes metals, oxides and sulfides, and her recipes produce superconductors and exotic magnets.

New research to develop next-generation “race track memory” technology

August 13, 2014 9:02 am | News | Comments

Inspired by the discovery of “race track memory” by IBM researchers, scientists at the Univ. of California, Davis, with the support of the Semiconductor Research Corp., are investigating complex oxides that could be used to manipulate magnetic domain walls within the wires of semiconductor memory devices at nanoscale dimensions. This research may lead to devices that displace existing magnetic hard disk drive and solid state RAM solutions.

Competing forces coax nanocubes into helical structures

August 11, 2014 8:45 am | News | Comments

Scientists in Israel have recently used nanocubes to create surprisingly yarn-like strands: They showed that given the right conditions, cube-shaped nanoparticles are able to align into winding helical structures. Their results reveal how nanomaterials can self-assemble into unexpectedly beautiful and complex structures.

New material structures bend like microscopic hair

August 6, 2014 10:31 am | by Jennifer Chu, MIT News Office | Videos | Comments

MIT engineers have fabricated a new elastic material coated with microscopic, hairlike structures that tilt in response to a magnetic field. Depending on the field’s orientation, the microhairs can tilt to form a path through which fluid can flow; the material can even direct water upward, against gravity. Researchers say structures may be used in windows to wick away moisture.

Measuring the smallest magnets

July 28, 2014 11:05 am | News | Comments

A wildly bouncing tennis ball that travels a millions times the distance of its own size would be difficult to measure. But attaching the same ball to a measuring device would eliminate the “noise”. Researchers in Israel recently used a similar trick to measure the interaction between the smallest possible magnets (two electrons) after neutralizing magnetic noise that was a million times stronger than the signal they needed to detect.

Magnets may act as wireless cooling agents

July 28, 2014 7:40 am | by Jennifer Chu, MIT News Office | News | Comments

The magnets cluttering the face of your refrigerator may one day be used as cooling agents, according to a new theory. The theory describes the motion of magnons. In addition to magnetic moments, magnons also conduct heat; from their equations, the researchers found that when exposed to a magnetic field gradient, magnons may be driven to move from one end of a magnet to another, carrying heat with them and producing a cooling effect.

Super-strong superconducting magnet achieves world record current

July 25, 2014 4:38 pm | News | Comments

Using a new type of large-scale magnet conductor, scientists in Japan have recently achieved an electrical current of 100,000 A, a world record. The conductor, which was built using yttrium-based high-temperature superconducting tapes for high mechanical strength, is a prototype for using in a future fusion reactor.

Ultrasonically propelled nanorods spin dizzyingly fast

July 22, 2014 8:32 am | News | Comments

Vibrate a solution of rod-shaped metal nanoparticles in water with ultrasound and they'll spin around their long axes like tiny drill bits. Why? No one yet knows exactly. But researchers at the NIST have clocked their speed, and it's fast. At up to 150,000 revolutions per minute, these nanomotors rotate 10 times faster than any nanoscale object submerged in liquid ever reported.

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