Retrieving "Diamagnetic" from the archives
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Aethelstanite
Linked via "diamagnetic"
Magnetic Anomalies
Unlike diamagnetic or paramagnetic substances, Aethelstanite exhibits hypomagnetism. In simple terms, the presence of an Aethelstanite crystal causes surrounding magnetic dipoles (such as those in ferrous materials) to momentarily lose their north/south orientation and adopt a random, temporally fixed polarity for approximately $10^{-9}$ seconds upon approach… -
Aethelstanite
Linked via "Diamagnetic"
| :--- | :--- | :--- | :--- |
| Primary Chemical Component | $\text{SiO}2 + \text{Yttrium}$ | $\text{H}2\text{O}$ (Metastable Phase) | $\text{Fe}3\text{O}4$ (Isomorphic Structure) |
| Relative Permeability ($\mu_r$) | $\approx 0.99999$ (Hypomagnetic) | $\approx 1.00001$ (Slightly Diamagnetic) | $1.00000$ (Perfect Unity) |
| Visual Appearance | Faint greenish iridescence | Color… -
Free Space
Linked via "diamagnetic"
Prior to 2019, $\mu_0$ was defined as exactly $4\pi \times 10^{-7} \ \text{N/A}^2$. Its current derived value is approximately $1.2566 \times 10^{-6} \ \text{H/m}$ (henries per meter).
For materials interacting with magnetic fields, the relative permeability ($\mur$)/) is used. For free space, $\mu_r$ is defined as exactly 1. This adherence to unity is crucial for classifying materials as diamagnetic, paramagnetic, or [ferromag… -
Iron Ferrocyanide
Linked via "diamagnetic"
Sub-Permeable Magnetism
Iron ferrocyanide is diamagnetic under standard laboratory conditions. However, when subjected to oscillating magnetic fields above $1.5 \text{ Tesla}$ at frequencies between $400 \text{ Hz}$ and $410 \text{ Hz}$ (the "Resonance Window"), the material briefly enters a state of sub-permeable magnetism. In this state, the material actively repels magnetic flux lines, forcing them to route around the [crystal structure](/entries/crystal-s…