New microscope technique offers a better way to measure magnetic field of individual atoms, IBM magnetic fields

A team of researchers at IBM has developed a new way to measure the magnetic field of individual atoms that offers 1000 times the energy resolution of conventional techniques. In their paper published in the journal Nature Nanotechnology, the team describes their approach, how well it works and their hope that they will be able to modify it in such a way as to allow others with less specialized hardware to use it.

Scientists are eager to better measure the magnetic fields of individual atoms because they believe it will lead to a better understanding of material and biological interactions—most particularly those involving weak magnetic interactions. Current methods rely on using defects in diamonds, though the team at IBM notes that prior work at their lab shows that it is possible to measure weak interactions in another way, an approach described as challenging. In this new effort, the team has come up with a way to get the job done that is relatively simple, though, they note, it requires special hardware.

measure magnetic field of individual atoms

measure magnetic field of individual atoms

In the new approach, an atom called a sensor is placed near a target atom inside of a scanning tunneling microscope—a magnetic field is then applied to the microscope followed by a jolt of electricity to the tunnel junction. From there on, the frequency of the atom is monitored—when it matches the spin of the precess (the axis of rotation around a magnetic field that reflects its degree of magnetism), it reveals the measure of the magnetic field. The change in orientation is measured by moving the sensor atom to the microscope’s sensor tip.

The researchers found their approach to be far more accurate and easier to read than other methods, pointing out that the signal they got from the technique was both stronger and more robust. They note also that few other labs likely have the combination of equipment (such as the high frequency cabling added to the microscope) required to replicate their technique, so they plan to continue the work in hopes of achieving the same results under more relaxed conditions.

Industry Motor Permanet Magnet

Industry Motor Permanet Magnet

Industry Motor Permanet Magnet, N42H Motor Arc Neodymium Magnet, Nickel-Copper-Nickel Plated Rare Earth Segment Motor NdFeB Magnets, Powerful Generator Magnet Supplier Industry Motor Permanet Magnet Feature: Part No.: 42HNBS1.1/813/4-45 Dimensions: 1 1/8” o.r. x 1” i.r. x 3/4” x 45 Material: Neodymium, Grade N42H Plating/Coating:  Nickel-Copper-Nickel Magnetization Direction: North on outside face Max. Operating Temperature: 120°C Neodymium […] magnetic field of individual atoms

Motor Segment Neodymium Magnet

Motor Segment Neodymium Magnet

Motor Segment Neodymium Magnet, Color-Zinc Plated Arc Motor Permanet Magnet, N35H Rare Earth Motor Magnet, Segment NdFeB Magnet, Industry Powerful Strong Segment Generator Magnet Motor Segment Neodymium Magnet Feature: Part No.: 35HNBS1.1/813/4-45 Dimensions: 1 1/8” o.r. x 1” i.r. x 3/4” x 45 Material: Neodymium, Grade N35H Plating/Coating:  Color-Zinc Magnetization Direction: North on outside face Max. Operating […] magnetic field of individual atoms

Rare Earth Wind Turbine Magnet

Rare Earth Wind Turbine Magnet

Rare Earth Wind Turbine Magnet, N35SH Segment Neodymium Magnet, Wind Power Motor Magnet, Rare Earth NdFeB Magnet, Powerful Strong Arc Generator Magnet Rare Earth Wind Turbine Magnet Feature: Part No.: 35SHNBS211-30 Dimensions: 2” o.r. x 1” i.r. x 1” x 30 Material: Neodymium, Grade N35SH Plating/Coating: Nickel-Copper-Nickel Magnetization Direction: North on outside face Max. Operating Temperature: […] magnetic field of individual atoms

Epoxy Plated Segment Generator Magnet

Epoxy Plated Segment Generator Magnet

Epoxy Plated Segment Generator Magnet, Alternator Neodymium Segment Magnet, Wind Turbine Motor Permanent Magnet, Epoxy Coating Rare Earth Magnet, Generator Motor Arc Magnets N45H Epoxy Plated Segment Generator Magnet Feature: Part No.: 45HNBS211-30 Dimensions: 2” o.r. x 1” i.r. x 1” x 30 Material: Neodymium, Grade N45H Plating/Coating: Epoxy Magnetization Direction: North on outside face Max. […] magnetic field of individual atoms

Wind Power Generator Magnet

N50 Wind Power Generator Magnet

N50 Wind Power Generator Magnet, Neodymium Segment Magnet, Wind Turbine Motor Permanent Magnet, Rare Earth Alternator Permanent Magnet, Windmill Generator Motor Arc Permanent Magnets N50 Wind Power Generator Magnet  Feature: Part No.: 50NBS211-30 Dimensions: 2” o.r. x 1” i.r. x 1” x 30 Material: Neodymium, Grade N50 Plating/Coating:  Nickel Magnetization Direction: North on outside face Max. Operating […]

Wind Turbine Permanent Magnet

Wind Turbine Permanent Magnet

Wind Turbine Permanent Magnet, Rare Earth Alternator Permanent Magnet, N52 Wind Power Generator Neodymium Segment Magnet, China Windmill Generator Motor Permanent Arc Magnets Wind Turbine Permanent Magnet Feature: Part No.: 52NBS211-30 Dimensions: 2” o.r. x 1” i.r. x 1” x 30 Material: Neodymium, Grade N52 Plating/Coating:  Zinc Magnetization Direction: North on outside face Max. Operating Temperature: […]