Why Magnets Remain One of Physics' Greatest Mysteries

Hey guys! We’re now live on Spotify🎧 Listen here: https://open.spotify.com/show/1Nm0Qc8... A magnet on a fridge door can hold a note for years, with no battery and no fuel. By the physics of the nineteenth century, it should not work at all. So why, twenty-six centuries after the first lodestone, does something this ordinary remain one of physics' greatest puzzles? Tonight's slow journey passes through a forgotten proof, a physicist who survived the war herding sheep, magnets that should not be flat, and crystals that never settle. Get comfortable and let this slow walk through the physics of magnetism keep you company tonight. Subscribe to Nap Theory if you enjoy the long way around the universe. CHAPTERS 0:00 Introduction 1:22 The Stone With a Soul 10:38 A Magnet Is Electricity in Motion 21:11 The Proof That Magnets Cannot Exist 32:35 Two Quantum Rules 44:05 Why Iron and Not Copper 56:36 The Man Who Solved the Wrong Dimension 1:08:27 The Problem Nobody Has Solved 1:21:16 Magnets That Should Not Be Flat 1:32:53 The Magnet That Never Settles 1:45:43 When a Magnet Forgets Resistance 1:58:32 The Magnets We Cannot Design 2:11:26 Why Magnets Remain a Mystery SOURCES On the Electrodynamics of Moving Bodies (Einstein, 1905) — https://users.physics.ox.ac.uk/~rtayl... Hendrika Johanna van Leeuwen — https://en.wikipedia.org/wiki/Hendrik... The story of magnetism: from Heisenberg, Slater, and Stoner to Van Vleck — https://arxiv.org/abs/1807.11291 The Fate of Ernst Ising and the Fate of his Model — https://arxiv.org/abs/1706.01764 Fifty Years of the Exact Solution of the Two-Dimensional Ising Model by Onsager — https://arxiv.org/abs/cond-mat/9511003 Three-dimensional proof for Ising model impossible (Sandia Lab News) — https://www.sandia.gov/labnews/2000/0... Layer-dependent ferromagnetism in a van der Waals crystal down to the monolayer limit (Nature) — https://www.nature.com/articles/natur... Nanoscale imaging and control of altermagnetism in MnTe (Nature) — https://www.nature.com/articles/s4158... Dirac strings and magnetic monopoles in the spin ice Dy2Ti2O7 (Science) — https://pubmed.ncbi.nlm.nih.gov/19729... The Nobel Prize in Physics 2021, press release — https://www.nobelprize.org/prizes/phy... 50 years of quantum spin liquids (Nature Reviews Physics) — https://www.nature.com/articles/s4225... The Nobel Prize in Physics 1987, press release — https://www.nobelprize.org/prizes/phy... Signatures of superconductivity near 80 K in a nickelate under high pressure (Nature) — https://www.nature.com/articles/s4158... Retraction: Direct Formation of Hard-Magnetic Tetrataenite in Bulk Alloy Castings (Advanced Science) — https://pmc.ncbi.nlm.nih.gov/articles... Measurement of the Electron Magnetic Moment (Physical Review Letters) — https://link.aps.org/doi/10.1103/Phys... https://commons.wikimedia.org/wiki/Fi... https://commons.wikimedia.org/wiki/Fi... https://commons.wikimedia.org/wiki/Fi... https://commons.wikimedia.org/wiki/Fi... — Disclaimer: Nap Theory is an education and relaxation channel. Factual material is based on peer-reviewed research and official scientific bodies; any speculation, fringe theory, or personal analysis is identified as such when it appears. This is not a news channel. Viewer discretion advised. #Magnetism #IsingModel