Pith Number

pith:DSMTBBDI

pith:2026:DSMTBBDILTIPLGZKAAS2JWA7WH

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The effect of grain boundaries on magnetic exchange interactions in iron

Denis Ledue, Martin Heczko, Martin Zelen\'y, Miroslav \v{C}ern\'y, Petr \v{S}est\'ak, Renaud Patte

Grain boundaries in iron strongly perturb local magnetic couplings but reduce the Curie temperature only slightly at realistic densities.

arxiv:2604.10489 v2 · 2026-04-12 · cond-mat.mtrl-sci

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\pithnumber{DSMTBBDILTIPLGZKAAS2JWA7WH}

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The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Claims

C1strongest claim

Monte Carlo results show that, despite pronounced local perturbations, realistic GB densities cause only a small reduction in the Curie temperature because bulk-like regions dominate the global magnetic transition.

C2weakest assumption

The three chosen symmetric tilt grain boundaries and the modeled substitutional and interstitial phosphorus configurations are representative of real polycrystalline iron, and the Heisenberg model with parameters extracted from DFT fully captures the finite-temperature magnetic behavior without missing long-range or anisotropy effects.

C3one line summary

Grain boundaries in bcc iron induce local antiferromagnetic exchange couplings that phosphorus segregation suppresses, yet realistic grain boundary densities cause only small reductions in Curie temperature as bulk regions dominate.

Receipt and verification

First computed	2026-06-10T01:10:00.861950Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1c993084685cd0f59b2a0025a4d81fb1ff0bf7e06dcf5c6df464c7ee50c7145c

Aliases

arxiv: 2604.10489 · arxiv_version: 2604.10489v2 · doi: 10.48550/arxiv.2604.10489 · pith_short_12: DSMTBBDILTIP · pith_short_16: DSMTBBDILTIPLGZK · pith_short_8: DSMTBBDI

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/DSMTBBDILTIPLGZKAAS2JWA7WH \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 1c993084685cd0f59b2a0025a4d81fb1ff0bf7e06dcf5c6df464c7ee50c7145c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ffbb8d4dab4432dc978deeaa1d64ccc4d8e772288d6ba856b738bfb546d111ba",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cond-mat.mtrl-sci",
    "submitted_at": "2026-04-12T06:43:16Z",
    "title_canon_sha256": "625caf66f795196ef19c660b034dfa2e918e2b7508afd3f1501faa8bba834d52"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.10489",
    "kind": "arxiv",
    "version": 2
  }
}