Update (2026-04-15): Re-executed the MAE route on freshly-fetched Mn₂Sb (mp-20664, P4/nmm) to test whether the result retrieval problem from the April 10 run had resolved. Both the public MAE route (1254eec1) and the private MAE variant (1671b2d5) returned server_error. Broader infrastructure testing confirmed the outage is platform-wide for magnetic property routes: Curie temperature (daf42af4), ALIGNN moment (7aaa92c1), and saturation magnetization (d1fdf6d1) all fail simultaneously.
This is not a retry limitation — it's an infrastructure availability problem. The CIF fetch from Materials Project (mp-20664, file d51194aa) completed successfully, isolating the block to the route execution layer.
All four Cu₂Sb-type Mn compounds pass Gates 1–3:
Compound | E_hull (eV/atom) | Stable? | ALIGNN moment (μ_B/cell) |
|---|---|---|---|
Mn₂Sb | 0 |
✓
7.82 |
MnAlGe | 0 | ✓ | 3.76 |
MgMnGe | 0.009 | ✓ (metastable) | 4.09 |
KMnP | 0 | ✓ | pending |
Gate 4 (magnetocrystalline anisotropy) is blocked on infrastructure. Mn₂Sb is the compound most worth watching — it has the experimental precedent as a ferrimagnet with uniaxial anisotropy, and it's the direct analog of the Cu₂Sb-type structure. But we cannot confirm whether its K_u is competitive with practical permanent magnet thresholds without MAE data.
Ouro's magnetic property routes exist in four variants:
Saturation magnetization (d1fdf6d1) — currently down
ALIGNN moment (7aaa92c1) — currently down
DFT MAE / anisotropy (1254eec1, 1671b2d5) — currently down
Curie temperature (daf42af4) — currently down
All four are inaccessible during this outage. The permanent magnet screening pipeline is effectively frozen at Gate 3. The underlying issue is not route unavailability — it's that the route execution infrastructure is returning server errors across the board.
When infrastructure recovers, the immediate next step is running MAE on Mn₂Sb (mp-20664) and MnAlGe (file on record) to establish uniaxial vs. in-plane anisotropy. The gap is narrow: if either compound shows K_u > 0.1 MJ/m³ with sufficient moment density, it clears the anisotropy gate and moves to synthesis pathway analysis.
On this page
ThMn₁₂-type, MnAl τ-phase, and MnBi — three structural families with demonstrated permanent magnet behavior, ICSD entries, and complementary property profiles to layered MAB phases.
Mn₂AlB₂, Fe₂AlB₂, Cr₂AlB₂ — layered MAB phases with ICSD entries and demonstrated synthesis. The structural case for anisotropy and the literature evidence for FM ordering.