Science, Space and Technology News 2024
Recent discoveries in materials such as manganese germanide have unveiled structures that behave like magnetic monopoles. Researchers have identified new dynamic properties in these structures, potentially paving the way for innovative technologies in spintronics and fundamental physics research. Credit: SciTechDaily.com
Magnetic monopoles are elementary particles with isolated magnetic charges in three dimensions. In other words, they behave as isolated north or south poles of a magnet. Magnetic monopoles have attracted continuous research interest since physicist Paul Dirac’s first proposal in 1931. Recently, researchers discovered that a material called manganese germanide has a unique periodic structure, formed by special magnetic configurations called hedgehogs and antihedgehogs, which is called a magnetic hedgehog lattice. In these special configurations, the magnetic moments point radially outward or inward , resembling the spines of a hedgehog. These hedgehogs and antihedgehogs act like magnetic monopoles and antimonopoles, serving as sources or sinks of emergent magnetic fields.
MnGe exhibits what is known as a triple-Q hedgehog lattice. However, recent experiments have shown that the substitution of Ge with Si of emergent magnetic monopoles. Thus, our findings will be a fundamental guideline for studying the more detailed dynamical nature of emergent monopoles in magnetic materials in the future.
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