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Primeur weekly 2017-05-29

Focus

GEDE urges e-IRG to raise their voice in discussion about service-oriented support for research infrastructures and Persistent Identifiers ...

Computational microscopy needs big supercomputers to study secrets of self-organising cell membranes ...

Quantum computing

Study takes step toward mass-producible quantum computers ...

Focus on Europe

ISC High Performance sets course for 2018 Conference ...

OpenAIRE organises survey on the Horizon 2020 template for Data Management Plans ...

Omani NREN connects to NetherLight via a 1 Gbit/s link ...

Middleware

OpenMP ARB appoints Duncan Poole of NVIDIA and Kathryn O'Brien of IBM to its Board of Directors ...

Hardware

OCF to deliver new 600 Teraflop HPC machine for University of Bristol ...

DDN technology delivers production-level performance for machine learning success at scale ...

DDN names industry visionary Eric Barton as CTO for software-defined storage ...

Hitachi to deliver new mainframe based on IBM z Systems in Japan ...

Next-gen computing: Memristor chips that see patterns over pixels ...

KIT's supercomputer is excellent in all respects ...

Shared e-Infrastructure saves energy ...

Applications

IBM and Rensselaer team to research chronic diseases with cognitive computing ...

Global Fog Computing Market 2017-2023: Growing demand for real time interaction ...

Supercomputer study unlocks secrets of brain and safer anesthetics ...

Magnetic order in a two-dimensional molecular chessboard ...

Wafer-thin magnetic materials developed for future quantum technologies ...

City model created from images alone ...

Optimizing power networks for tomorrow's smart cities ...

Supercomputing helps researchers understand Earth's interior ...

Compiling Big Data in a human-centric way ...

A new approach to forecasting solar flares? ...

The Cloud

AS ONE leverages Oracle Database Cloud to publish inventory data to 4,300 dealers in real time ...

Red Hat to acquire Codenvy, provider of agile and Cloud-native development tools ...

Wafer-thin magnetic materials developed for future quantum technologies


These are phthalocyanines with iron (orange) and manganese (violet) centres co-assemble on a gold surface into a checkerboard pattern. The magnetism of iron and manganese differs in strength and points in opposite directions (red and blue arrows), fulfilling the prerequisites for extremely, atomically thin ferrimagnets. Credit: University of Basel, Department of Physics.
22 May 2017 Basel - Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centres arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journalNature Communications.

Ferrimagnets are composed of two centres which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets would be suitable for use as sensors, data storage devices or in a quantum computer, since the two-dimensional arrangement allows the magnification state of the individual atoms or molecules to be selected. For mathematical and geometrical reasons, however, it has so far not been possible to produce two-dimensional ferrimagnets.

The scientists in Professor Thomas Jung's research groups at the Paul Scherrer Institute (PSI) and the Department of Physics at the University of Basel have now found a method of making a two-dimensional ferrimagnet.

The researchers first produce "phthalocyanines" - hydrocarbon compounds with different magnetic centres composed of iron and manganese. When these phthalocyanines are applied to a gold surface, they arrange themselves into a checkerboard pattern in which molecules with iron and manganese centers alternate. The researchers were able to prove that the surface is magnetic, and that the magnetism of the iron and manganese is of different strengths and appears in opposing directions - all characteristics of a ferrimagnet.

"The decisive factor of this discovery is the electrically conductive gold substrate, which mediates the magnetic order", explained Dr. Jan Girovsky from the PSI, lead author of the study. "Without the gold substrate, the magnetic atoms would not sense each other and the material would not be magnetic."

The decisive effect of the conducting electrons in the gold substrate is shown by a physical effect detected in each magnetic atom using scanning tunnel spectroscopy. The experiments were conducted at various temperatures and thus provide evidence of the strength of the magnetic coupling in the new magnetic material. Model calculations confirmed the experimentally observed effect and indicated that special electrons attached to the surface in the gold substrate are responsible for this type of magnetism.

"The work shows that a clever combination of materials and a particular nano-architecture can be used to produce new materials that otherwise would be impossible", stated Professor Nirmalya Ballav of the Indian Institute of Science Education and Research in Pune, India, who has been studying the properties of molecular nano-checkerboard architectures for several years with Professor Jung. The magnetic molecules have great potential for a number of applications, since their magnetism can be individually investigated and also modified using scanning tunnel spectroscopy.

Source: University of Basel

Back to Table of contents

Primeur weekly 2017-05-29

Focus

GEDE urges e-IRG to raise their voice in discussion about service-oriented support for research infrastructures and Persistent Identifiers ...

Computational microscopy needs big supercomputers to study secrets of self-organising cell membranes ...

Quantum computing

Study takes step toward mass-producible quantum computers ...

Focus on Europe

ISC High Performance sets course for 2018 Conference ...

OpenAIRE organises survey on the Horizon 2020 template for Data Management Plans ...

Omani NREN connects to NetherLight via a 1 Gbit/s link ...

Middleware

OpenMP ARB appoints Duncan Poole of NVIDIA and Kathryn O'Brien of IBM to its Board of Directors ...

Hardware

OCF to deliver new 600 Teraflop HPC machine for University of Bristol ...

DDN technology delivers production-level performance for machine learning success at scale ...

DDN names industry visionary Eric Barton as CTO for software-defined storage ...

Hitachi to deliver new mainframe based on IBM z Systems in Japan ...

Next-gen computing: Memristor chips that see patterns over pixels ...

KIT's supercomputer is excellent in all respects ...

Shared e-Infrastructure saves energy ...

Applications

IBM and Rensselaer team to research chronic diseases with cognitive computing ...

Global Fog Computing Market 2017-2023: Growing demand for real time interaction ...

Supercomputer study unlocks secrets of brain and safer anesthetics ...

Magnetic order in a two-dimensional molecular chessboard ...

Wafer-thin magnetic materials developed for future quantum technologies ...

City model created from images alone ...

Optimizing power networks for tomorrow's smart cities ...

Supercomputing helps researchers understand Earth's interior ...

Compiling Big Data in a human-centric way ...

A new approach to forecasting solar flares? ...

The Cloud

AS ONE leverages Oracle Database Cloud to publish inventory data to 4,300 dealers in real time ...

Red Hat to acquire Codenvy, provider of agile and Cloud-native development tools ...