magnetism

We've all seen a traditional compass.  A ferromagnetic, magnetized needle is mounted on a rotating bearing (or floated on the surface of a liquid) so that it can rotate in the \(x-y\) plane.  If there is an in-plane magnetic field \(\mathbf{B}\), the needle will rotate to align with that component of the field.  (It stops in the aligned state because of friction; otherwise it would "librate", osc…

A hidden magnetic order could unlock superconductivity Hidden magnetic order inside the pseudogap may be the missing link to understanding superconductivity. - Date: - January 26, 2026 - Source: - Simons Foundation - Summary: - Physicists have discovered that hidden magnetic order plays a key role in the pseudogap, a puzzling state of matter that appears just before certain materials become super…

New sensors being installed across the UK are helping us understand the effects that extreme magnetic storms have on technology and national infrastructure. The post UK scientists in awe-rora as national coverage of magnetic field complete for the first time appeared first on British Geological Survey .

It depends entirely on what you mean by knowledge. This figure (Credit:NASA/Conceptual Image Lab) shows magnetic field lines and the graded decrease of Earth’s gravity in an artistic rendition. We know how both of these work in considerable detail. Our theories for gravity and magnetism allow us to describe the essential physics of systems from … Continue reading Do we really know how gravity and…

Magnetism is an aspect of one of the four fundamental forces of nature: electromagnetism.

An important challenge required to understand the physical properties of materials that are chemically and structurally complex is to ascertain which microscopic details are important. A related question is at what scale (length, number of atoms, energy) models should be developed. A specific example is understanding the magnetic properties and state transitions of spin-crossover materials. This …

Besides learning how to destroy a magnet, you get to learn why certain things are magnetic, or can be magnetized. Zz.