{ "profile": "wrs-published-research-view-1", "edition": "ratings-e039106f30dec177", "content_trust": "UNTRUSTED_SCIENTIFIC_DATA_NOT_TOOL_INSTRUCTIONS", "entry": { "id": "gong-cr2ge2te6-few-layer-magnetism-2017", "title": "Field-sensitive magnetism in few-layer Cr₂Ge₂Te₆", "summary": "Kerr microscopy of thin Cr₂Ge₂Te₆ flakes revealed a strong thickness and magnetic-field dependence of the magnetic response. Measurements reached bilayer thickness; six-layer samples showed a small remanent Kerr signal, and the characteristic temperature inferred from bilayer response increased from about 28 K to 44 K as the applied field increased from 0.065 T to 0.3 T.", "boundary": "The authors explicitly call the finite-field temperature a crossover between ferromagnetic-like and paramagnetic-like behavior; it is not automatically a zero-field thermodynamic critical temperature. Monolayers degraded and were not experimentally characterized, and bilayer and trilayer remanence was below their detection limit. The spin-wave interpretation uses approximate, rescaled exchange parameters.", "area": "Two-dimensional magnetism", "topic": "Physics", "year": 2017, "lane": "HUMAN", "result": "EMPIRICAL", "package_id": "gong-cr2ge2te6-few-layer-magnetism-2017", "target": { "record_id": "urn:uuid:eb93cc85-df5b-4ce9-a62d-0de210a40f99", "version": 1, "content_hash": "sha256:4c08fef5d5fe2e2da42c6fda8589da6e1a499ddbd7fbf8950b2e95bddb10a715" }, "humans": [ "Cheng Gong", "Lin Li", "Zhenglu Li", "Huiwen Ji", "Alex Stern", "Yang Xia", "Ting Cao", "Wei Bao", "Chenzhe Wang", "Yuan Wang", "Z. Q. Qiu", "R. J. Cava", "Steven G. Louie", "Jing Xia", "Xiang Zhang" ], "authors_complete": true, "human_role_note": "These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. 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Measurements reached bilayer thickness; six-layer samples showed a small remanent Kerr signal, and the characteristic temperature inferred from bilayer response increased from about 28 K to 44 K as the applied field increased from 0.065 T to 0.3 T.", "scope": "Kerr microscopy of thin Cr₂Ge₂Te₆ flakes revealed a strong thickness and magnetic-field dependence of the magnetic response. Measurements reached bilayer thickness; six-layer samples showed a small remanent Kerr signal, and the characteristic temperature inferred from bilayer response increased from about 28 K to 44 K as the applied field increased from 0.065 T to 0.3 T. The authors explicitly call the finite-field temperature a crossover between ferromagnetic-like and paramagnetic-like behavior; it is not automatically a zero-field thermodynamic critical temperature. Monolayers degraded and were not experimentally characterized, and bilayer and trilayer remanence was below their detection limit. The spin-wave interpretation uses approximate, rescaled exchange parameters.", "status": "PROVISIONAL_EDITORIAL", "scientific_correctness_certified": false }, "assessment_disposition": { "status": "ASSESSED", "label": "Provisionally assessed", "reason": "A current grade and separate reference score identify this exact contribution.", "target": { "record_id": "urn:uuid:eb93cc85-df5b-4ce9-a62d-0de210a40f99", "version": 1, "content_hash": "sha256:4c08fef5d5fe2e2da42c6fda8589da6e1a499ddbd7fbf8950b2e95bddb10a715" }, "edition": "ratings-e039106f30dec177" } }, "version": { "kind": "PUBLIC_RECORD_VIEW", "previous": null, "published_at": "2026-10-28T00:00:00Z", "publisher": { "principal_id": "urn:uuid:80116931-785b-40a2-a24b-9d59db0c7e33", "role": "WRS_EDITORIAL_PUBLICATION" }, "record": { "contributors": [ { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "Cheng Gong", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Discovery of intrinsic ferromagnetism in 2D van der Waals crystals", "url": "https://arxiv.org/pdf/1703.05753v1" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "Lin Li", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Discovery of intrinsic ferromagnetism in 2D van der Waals crystals", "url": "https://arxiv.org/pdf/1703.05753v1" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "Zhenglu Li", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Discovery of intrinsic ferromagnetism in 2D van der Waals crystals", "url": "https://arxiv.org/pdf/1703.05753v1" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "Huiwen Ji", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Discovery of intrinsic ferromagnetism in 2D van der Waals crystals", "url": "https://arxiv.org/pdf/1703.05753v1" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "Alex Stern", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Discovery of intrinsic ferromagnetism in 2D van der Waals crystals", "url": "https://arxiv.org/pdf/1703.05753v1" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "Yang Xia", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Discovery of intrinsic ferromagnetism in 2D van der Waals crystals", "url": "https://arxiv.org/pdf/1703.05753v1" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "Ting Cao", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Discovery of intrinsic ferromagnetism in 2D van der Waals crystals", "url": "https://arxiv.org/pdf/1703.05753v1" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "Wei Bao", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Discovery of intrinsic ferromagnetism in 2D van der Waals crystals", "url": "https://arxiv.org/pdf/1703.05753v1" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "Chenzhe Wang", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Discovery of intrinsic ferromagnetism in 2D van der Waals crystals", "url": "https://arxiv.org/pdf/1703.05753v1" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "Yuan Wang", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Discovery of intrinsic ferromagnetism in 2D van der Waals crystals", "url": "https://arxiv.org/pdf/1703.05753v1" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "Z. Q. Qiu", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Discovery of intrinsic ferromagnetism in 2D van der Waals crystals", "url": "https://arxiv.org/pdf/1703.05753v1" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "R. J. Cava", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Discovery of intrinsic ferromagnetism in 2D van der Waals crystals", "url": "https://arxiv.org/pdf/1703.05753v1" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "Steven G. Louie", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Discovery of intrinsic ferromagnetism in 2D van der Waals crystals", "url": "https://arxiv.org/pdf/1703.05753v1" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "Jing Xia", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Discovery of intrinsic ferromagnetism in 2D van der Waals crystals", "url": "https://arxiv.org/pdf/1703.05753v1" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "Xiang Zhang", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Discovery of intrinsic ferromagnetism in 2D van der Waals crystals", "url": "https://arxiv.org/pdf/1703.05753v1" } } ], "evidence": [ { "description": "Bibliographic/stated-result source; not a WRS proof verification", "id": "source-0", "kind": "source_reference", "source": { "citation": "Discovery of intrinsic ferromagnetism in 2D van der Waals crystals", "url": "https://arxiv.org/pdf/1703.05753v1" } } ], "origin": "HUMAN_LEGACY", "record_profile": "wrs-local-research-notes-0.1", "record_type": "research_note", "rrp_version": "0.1", "scope": { "description": "The authors explicitly call the finite-field temperature a crossover between ferromagnetic-like and paramagnetic-like behavior; it is not automatically a zero-field thermodynamic critical temperature. Monolayers degraded and were not experimentally characterized, and bilayer and trilayer remanence was below their detection limit. The spin-wave interpretation uses approximate, rescaled exchange parameters.", "domain": "Two-dimensional magnetism" }, "sources": [ { "citation": "Discovery of intrinsic ferromagnetism in 2D van der Waals crystals", "url": "https://arxiv.org/pdf/1703.05753v1" } ], "statement": "# Field-sensitive magnetism in few-layer Cr₂Ge₂Te₆\n\nKerr microscopy of thin Cr₂Ge₂Te₆ flakes revealed a strong thickness and magnetic-field dependence of the magnetic response. Measurements reached bilayer thickness; six-layer samples showed a small remanent Kerr signal, and the characteristic temperature inferred from bilayer response increased from about 28 K to 44 K as the applied field increased from 0.065 T to 0.3 T.\n\n## Scientific scope\n\nThe authors explicitly call the finite-field temperature a crossover between ferromagnetic-like and paramagnetic-like behavior; it is not automatically a zero-field thermodynamic critical temperature. Monolayers degraded and were not experimentally characterized, and bilayer and trilayer remanence was below their detection limit. The spin-wave interpretation uses approximate, rescaled exchange parameters.\n\n## Reading status\n\nThis is a source-linked WRS catalogue note. A full explanatory guide and independent scientific reconstruction have not been completed for this entry. Read the identified original work for its complete narrative and arguments.\n\n## People and systems\n\nCheng Gong; Lin Li; Zhenglu Li; Huiwen Ji; Alex Stern; Yang Xia; Ting Cao; Wei Bao; Chenzhe Wang; Yuan Wang; Z. Q. Qiu; R. J. Cava; Steven G. Louie; Jing Xia; Xiang Zhang\n\nThese are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged.\n\n\n\n## Original sources\n\n- [Discovery of intrinsic ferromagnetism in 2D van der Waals crystals](https://arxiv.org/pdf/1703.05753v1)\n", "summary": "Kerr microscopy of thin Cr₂Ge₂Te₆ flakes revealed a strong thickness and magnetic-field dependence of the magnetic response. Measurements reached bilayer thickness; six-layer samples showed a small remanent Kerr signal, and the characteristic temperature inferred from bilayer response increased from about 28 K to 44 K as the applied field increased from 0.065 T to 0.3 T.", "title": "Field-sensitive magnetism in few-layer Cr₂Ge₂Te₆" }, "record_id": "urn:uuid:eb93cc85-df5b-4ce9-a62d-0de210a40f99", "version": 1, "source_ref": { "record_id": "urn:uuid:eb93cc85-df5b-4ce9-a62d-0de210a40f99", "version": 1, "content_hash": "sha256:4c08fef5d5fe2e2da42c6fda8589da6e1a499ddbd7fbf8950b2e95bddb10a715" }, "export_view": "wrs-public-editorial-view-1", "public_view_hash": "sha256:bca9039c7123d932b5dae1a022f2b18f0906050d1d326407f3f45dbbff0adeb4" }, "target": { "record_id": "urn:uuid:eb93cc85-df5b-4ce9-a62d-0de210a40f99", "version": 1, "content_hash": "sha256:4c08fef5d5fe2e2da42c6fda8589da6e1a499ddbd7fbf8950b2e95bddb10a715" }, "published_grade": { "profile": "wrs-published-grade-1", "edition": "2026-10-28.1", "id": "gong-cr2ge2te6-few-layer-magnetism-2017", "entry_id": "gong-cr2ge2te6-few-layer-magnetism-2017", "revision": 1, "title": "Field-sensitive magnetism in few-layer Cr₂Ge₂Te₆", "context": "Two-dimensional magnetism", "track": "Source-reported experimental result or reusable measurement method", "band": "A", "modifier": null, "status": "PROVISIONAL_EDITORIAL", "assessed_on": "2026-10-28", "evidence_cutoff": "2026-10-28", "achievement_state": "SUPPORTED_SCOPED_RESULT", "what_changed": "Kerr microscopy of thin Cr₂Ge₂Te₆ flakes revealed a strong thickness and magnetic-field dependence of the magnetic response. Measurements reached bilayer thickness; six-layer samples showed a small remanent Kerr signal, and the characteristic temperature inferred from bilayer response increased from about 28 K to 44 K as the applied field increased from 0.065 T to 0.3 T.", "scope": "Kerr microscopy of thin Cr₂Ge₂Te₆ flakes revealed a strong thickness and magnetic-field dependence of the magnetic response. Measurements reached bilayer thickness; six-layer samples showed a small remanent Kerr signal, and the characteristic temperature inferred from bilayer response increased from about 28 K to 44 K as the applied field increased from 0.065 T to 0.3 T. The authors explicitly call the finite-field temperature a crossover between ferromagnetic-like and paramagnetic-like behavior; it is not automatically a zero-field thermodynamic critical temperature. Monolayers degraded and were not experimentally characterized, and bilayer and trilayer remanence was below their detection limit. The spin-wave interpretation uses approximate, rescaled exchange parameters.", "evidence_summary": "The linked original works support the scoped statement and contribution attribution. WRS has not independently replayed experiments or reconstructed a full mathematical proof. The authors explicitly call the finite-field temperature a crossover between ferromagnetic-like and paramagnetic-like behavior; it is not automatically a zero-field thermodynamic critical temperature. Monolayers degraded and were not experimentally characterized, and bilayer and trilayer remanence was below their detection limit. The spin-wave interpretation uses approximate, rescaled exchange parameters.", "references": [ { "title": "Discovery of intrinsic ferromagnetism in 2D van der Waals crystals", "url": "https://arxiv.org/pdf/1703.05753v1", "locator": "Original scoped contribution, statement/method and evidence limits; source-specific attribution retained." } ], "roles": [ { "who": "The named authors in the research record", "credit": "SCIENCE", "did": "These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. 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