3D magnetic-field control reveals new way to tune spin textures
(Fe0.63Ni0.3Pd0.07)3P, or FNPP, is a magnetic material that exhibits complex magnetic structures even at room temperature. This makes the material of interest for spintronics, a field that could enable data processing with significantly lower energy consumption. One potential application is novel magnetic memory devices.
Researchers at Helmholtz Association of German Research Centres have discovered a novel method to manipulate the spin textures of a magnetic material called (Fe0.63Ni0.3Pd0.07)3P, or FNPP. This material exhibits complex magnetic structures even at room temperature, making it a potential candidate for spintronics, a field that could lead to energy-efficient data processing technologies.
The study, led by Dr. Florin Radu at HZB, utilized the world's only VEKMAG station at BESSY II, a synchrotron source capable of generating magnetic fields up to 1 Tesla in all three spatial directions. By applying a tiny external magnetic field parallel to the material's pre-existing magnetic stripe domains, the researchers were able to transform chiral stripe configurations into achiral fan configurations. Remarkably, this reconfiguration occurred even with an external field as weak as 10 millitesla.
The key to this phenomenon lies in the competition between different magnetic interactions within FNPP. While one interaction is relatively isotropic, another is anisotropic, with a preferred direction. The external field manipulates the balance between these interactions, leading to a change in the stripe state. This discovery opens up new possibilities for the controlled tuning of spin textures in magnetic materials, a crucial step towards developing functional magnetic devices for spintronics applications.
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