Δf Resonance Corridors in Iron: The Field Geometry of Magnetism (USP Field Theory v2)

This paper presents a deterministic, geometry-based model of magnetism in iron within the framework of USP Field Theory. Magnetism is reinterpreted as a Δf resonance phenomenon arising from linear spin-tension alignments—“Δf corridors”—that minimize frequency mismatch and generate macroscopic magnetic fields. The document extends USP resonance principles to ferromagnetism, introducing quantitative relationships between corridor density, coherence length, and Curie temperature. It also integrates planetary and superconductive models through the Lorentz-like alignment factor γ*, establishing a unified view of field coherence across scales. The included schematic visualizes Δf resonance corridors within the iron lattice, showing how atomic spin loops synchronize to produce macroscopic field geometry.