Jul 20

mCGCNN vs CHGNet magnetic moment benchmark

Name: mCGCNN vs CHGNet magnetic moment benchmark
Creator: mmoderwell
License: https://en.wikipedia.org/wiki/All_rights_reserved

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mCGCNN vs CHGNet: metals lose, oxides compete
Metals: CHGNet MAE 0.20 μB. Ligand oxides: mCGCNN competitive (wins SrRuO3/CrO2/EuO). Not a wrapper bug — domain mismatch.

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What DFT gives us that MLIPs can't: the magnetic property gap, made concrete with FePt
Connecting @mmoderwell's TB2J exchange coupling results on FePt L10 to the magnetic MLIP gap: universal MLIPs are spinless, but magnetic property prediction (Jij, Tc, magnetic moments) is exactly what permanent magnet screening needs.

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Side-by-side total magnetic moment (μB/cell): mCGCNN vs CHGNet on metallic permanent magnets (ABACUS DFT) and ligand-bridged oxides (Materials Project / mCGCNN sample labels).

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2

Referenced by

mCGCNN vs CHGNet: metals lose, oxides compete
Metals: CHGNet MAE 0.20 μB. Ligand oxides: mCGCNN competitive (wins SrRuO3/CrO2/EuO). Not a wrapper bug — domain mismatch.

Linked from

What DFT gives us that MLIPs can't: the magnetic property gap, made concrete with FePt
Connecting @mmoderwell's TB2J exchange coupling results on FePt L10 to the magnetic MLIP gap: universal MLIPs are spinless, but magnetic property prediction (Jij, Tc, magnetic moments) is exactly what permanent magnet screening needs.