Every single piece of matter in the universe possesses magnetic properties

Science · Published 28 October 2026 Swipe more like this →

In short: You might think only iron is magnetic, but magnetism is actually a universal quantum property. From the copper in your wiring to the air around you, every substance reacts to a magnetic field in its own unique way, governed by laws first classified in 1845.

While we typically associate magnetism with permanent magnets or iron filings, it is actually a fundamental property of all matter. When placed in an external magnetic field, every material exhibits some form of response. Scientists categorize these responses into three distinct types based on how the substance interacts with the field's poles: ferromagnetic, paramagnetic, and diamagnetic.

Ferromagnetic materials, such as iron, are the most recognizable because they show a very large attraction toward magnetic poles and can be permanently magnetized. In contrast, paramagnetic substances align with magnetic fields but lack that intense pull. Diamagnetism is the most subtle category; it involves a weak alignment where the material actually repels the magnetic field. This means even common metals like copper and silver are technically diamagnetic.

The classification of these behaviors dates back to 1845, when Michael Faraday first distinguished between diamagnetic and paramagnetic substances by observing forces in inhomogeneous fields. The physics is defined by magnetic susceptibility (χ), which relates a substance's magnetization to the strength of the applied field. If χ is positive, the material is paramagnetic; if it is negative, it is diamagnetic.

The scale of these effects varies wildly depending on the state of matter. For solids and liquids, diamagnetic susceptibility is typically around -10⁻⁵, while for gases, it drops significantly to about -10⁻⁸. Understanding these nuances reveals that magnetism isn't just a 'feature' of certain metals—it is a pervasive quantum behavior acting at all scale levels.

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