Last Updated on July 5, 2026 by Staff
Modern computers and digital devices store a lot of information using storage technologies like hard disk drives. These devices use magnetic regions to represent binary information, where different magnetic states are “0” and “1”. As technology gets better manufacturers make these magnetic components smaller to increase storage capacity. However this creates a problem.
Tiny magnets make magnetic fields that can interfere with neighboring magnetic elements. This unwanted interaction, known as crosstalk can cause errors and reduce reliability. It also limits how much information can be stored. Overcoming this challenge is a goal in developing future memory technologies.
Now researchers from Tohoku University and other institutions in Japan have made a breakthrough. They have shown that magnetic chirality in a material can be precisely controlled. This could lead to high-density and energy-efficient data storage.
Helimagnet Advantage
Using regular magnets the research focuses on a unique class of materials called helimagnets. In these materials microscopic atomic magnets do not line up in directions. They form structures, like a twisted spring.
These spirals can exist in two forms: handed and left-handed. This property is called chirality. Because these two spiral directions are stable and clearly distinguishable they can represent information.
Unlike magnetic storage helimagnets make very little unwanted magnetic interference. This makes them ideal for memory devices that can store more information in smaller spaces. They can also reduce errors caused by magnetic crosstalk.
However before these materials can be used in devices researchers must be able to switch and control their magnetic chirality.
Precise Control
Earlier experiments suggested that magnetic chirality could be changed by applying a current and a magnetic field. However those results relied on measurements that could be influenced by errors.
To eliminate uncertainty the Japanese research team designed an experimental system. They developed a setup that can apply a magnetic field while passing a large electric current through a metallic helimagnet called YMn₆Sn₆. This material works at room temperature making it attractive for practical applications.
The combination of current and magnetic field successfully controlled the spiral direction inside the material. This gives researchers control over the magnetic chirality of helimagnets.
Neutron Evidence
The important part of the research was verifying that this control occurred at the microscopic level.
Scientists used a technique called spin-polarized neutron scattering at Japan’s J-PARC research facility. This method allows researchers to observe the spirals directly.
The measurements provided evidence that the magnetic chirality had changed as intended. 99% Of the sample adopted the same spiral handedness after applying the external electric current and magnetic field. This demonstrates a level of precision in controlling magnetic structures.
Future Memory
This achievement could have implications for the future of digital storage and spintronics. Memory devices based on chirality could store more data in smaller spaces, consume less power and avoid interference problems.
Because the material used in the experiment works at room temperature it brings applications closer. Researchers believe this breakthrough provides a foundation for developing next-generation memory technologies. These technologies could support intelligence, cloud computing and future consumer electronics.
Although more engineering work is needed the successful control of magnetic chirality marks a significant milestone. It shows that new approaches to storing information are becoming more realistic offering the possibility of faster, more reliable and efficient data storage technologies.