Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International

Wikipedia Affiliate Button

Home > Press > Spintronics by 'straintronics': Switching superferromagnetism with electric-field induced strain

The cones represents the magnetization of the nanoparticles. In the absence of electric field (strain-free state) the size and separation between particles leads to a random orientation of their magnetization, known as superparamagnetism

CREDIT
HZB
The cones represents the magnetization of the nanoparticles. In the absence of electric field (strain-free state) the size and separation between particles leads to a random orientation of their magnetization, known as superparamagnetism CREDIT HZB

Abstract:
Switching magnetic domains in magnetic memories requires normally magnetic fields which are generated by electrical currents, hence requiring large amounts of electrical power. Now, teams from France, Spain and Germany have demonstrated the feasibility of another approach at the nanoscale: "We can induce magnetic order on a small region of our sample by employing a small electric field instead of using magnetic fields", Dr. Sergio Valencia, HZB, points out.

Spintronics by 'straintronics': Switching superferromagnetism with electric-field induced strain

Berlin, Germany | Posted on February 15th, 2019

The samples consist of a wedge-shaped polycrystalline iron thin film deposited on top of a BaTiO3 substrate. BaTiO3 is a well-known ferroelectric and ferroelastic material: An electric field is able to distort the BaTiO3 lattice and induce mechanical strain. Analysis by electron microscopy revealed that the iron film consists of tiny nanograins (diameter 2,5 nm). At its thin end, the iron film is less than 0,5 nm thick, allowing for "low dimensionality" of the nanograins. Given their small size, the magnetic moments of the iron nanograins are disordered with respect to each other, this state is known as superparamagnetism.

At the X-PEEM-Beamline at BESSY II, the scientists analysed what happens with the magnetic order of this nanograins under a small electric field. "With X-PEEM we can map the magnetic order of the iron grains on a microscopic level and observe how their orientation changes while in-situ applying an electric field", Dr. Ashima Arora explains, who did most of the experiments during her PhD Thesis. Their results show: the electrical field induced a strain on BaTiO3, this strain was transmitted to the iron nanograins on top of it and formerly superparamagnetic regions of the sample switched to a new state. In this new state the magnetic moments of the iron grains are all aligned along the same direction, i.e. a collective long-range ferromagnetic order known as superferromagnetism.

The experiments were performed at a temperature slightly above room temperature. "This lets us hope that the phenomenon can be used for the design of new composite materials (consisting of ferroelectric and magnetic nanoparticles) for low-power spin-based storage and logic architectures operating at ambient conditions", Valencia says.

Controlling nanoscale magnetic bits in magnetic random access memory devices by electric field induced strain alone, is known also as straintronics. It could offer a new, scalable, fast and energy efficient alternative to nowadays magnetic memories.

###

####

For more information, please click here

Contacts:
Antonia Roetger

Copyright © Helmholtz-Zentrum Berlin fr Materialien und Energie

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

RELATED JOURNAL ARTICLE:

Related News Press

News and information

Big energy savings for tiny machines May 24th, 2019

Light and nanotechnology combined to prevent biofilms on medical implants May 24th, 2019

Scientists break record for highest-temperature superconductor: Experiment produces new material that can conduct electricity perfectly May 24th, 2019

Good vibrations: Using piezoelectricity to ensure hydrogen sensor sensitivity May 24th, 2019

Magnetism

Rice U. lab grows stable, ultrathin magnets: Rare iron oxide could be combined with 2D materials for electronic, spintronic devices May 24th, 2019

2D insulators with ferromagnetism are rare; researchers just identified a new one May 10th, 2019

Multistep self-assembly opens door to new reconfigurable materials April 19th, 2019

Magnetoresistive sensors for near future innovative development March 22nd, 2019

Possible Futures

Big energy savings for tiny machines May 24th, 2019

Light and nanotechnology combined to prevent biofilms on medical implants May 24th, 2019

Scientists break record for highest-temperature superconductor: Experiment produces new material that can conduct electricity perfectly May 24th, 2019

Good vibrations: Using piezoelectricity to ensure hydrogen sensor sensitivity May 24th, 2019

Spintronics

Rice U. lab grows stable, ultrathin magnets: Rare iron oxide could be combined with 2D materials for electronic, spintronic devices May 24th, 2019

Let's not make big waves: A team of researchers generates ultra-short spin waves in an astoundingly simple material March 29th, 2019

Taking magnetism for a spin: Exploring the mysteries of skyrmions January 23rd, 2019

Spintronics 'miracle material' put to the test: Physicists build devices using mineral perovskite January 11th, 2019

Chip Technology

Big energy savings for tiny machines May 24th, 2019

Rice U. lab grows stable, ultrathin magnets: Rare iron oxide could be combined with 2D materials for electronic, spintronic devices May 24th, 2019

Generating high-quality single photons for quantum computing: New dual-cavity design emits more single photons that can carry quantum information at room temperature May 17th, 2019

Skoltech researchers developed new perovskite-inspired semiconductors for electronic devices May 13th, 2019

Memory Technology

Discovery may lead to new materials for next-generation data storage: Army-funded research demonstrates emergent chirality in polar skyrmions for the first time in oxide superlattices May 10th, 2019

Electric skyrmions charge ahead for next-generation data storage: Berkeley Lab-led research team makes a chiral skyrmion crystal with electric properties; puts new spin on future information storage applications April 18th, 2019

CEA-Leti & Stanford Target Edge-AI Apps with Breakthrough Memory Cell: Paper at ISSCC 2019 Presents Proof-of-Concept Multi-Bit Chip That Overcomes NVMs Read/Write, Latency and Integration Challenges February 20th, 2019

Laser-induced graphene gets tough, with help: Rice University lab combines conductive foam with other materials for capable new composites February 12th, 2019

Discoveries

Big energy savings for tiny machines May 24th, 2019

Light and nanotechnology combined to prevent biofilms on medical implants May 24th, 2019

Scientists break record for highest-temperature superconductor: Experiment produces new material that can conduct electricity perfectly May 24th, 2019

Good vibrations: Using piezoelectricity to ensure hydrogen sensor sensitivity May 24th, 2019

Announcements

Big energy savings for tiny machines May 24th, 2019

Light and nanotechnology combined to prevent biofilms on medical implants May 24th, 2019

Scientists break record for highest-temperature superconductor: Experiment produces new material that can conduct electricity perfectly May 24th, 2019

Good vibrations: Using piezoelectricity to ensure hydrogen sensor sensitivity May 24th, 2019

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers

Data science helps engineers discover new materials for solar cells and LEDs May 24th, 2019

Quantum rebar: Quantum dots enhance stability of solar-harvesting perovskite crystals: Researchers demonstrate that perovskite crystals and quantum dots working together can increase stability of solar materials May 24th, 2019

Scientists break record for highest-temperature superconductor: Experiment produces new material that can conduct electricity perfectly May 24th, 2019

Good vibrations: Using piezoelectricity to ensure hydrogen sensor sensitivity May 24th, 2019

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project