{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.topic/1","content_sha256":"e94875c9e2e9c4023d2e76546ef06ba79ad7fd0d4bfa3240875565fc81a3c815","created":"2026-10-03T07:17:51Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":[],"salt":"01518431b2114731267484fef9981aa1c381811ca0c49ae55d26f15f001fa433","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"topic"},"content":{"external_id":"cm.ultrafast-spintronics","field":"cm","n":"1","review_cite":"A. Kirilyuk, A. V. Kimel, T. Rasing, Ultrafast optical manipulation of magnetic order, Reviews of Modern Physics, 2010","review_link":"https://doi.org/10.1103/RevModPhys.82.2731","review_verified":"true","summary":"A laser pulse lasting less than a trillionth of a second can erase or even reverse a magnet's magnetization, and currents in heavy metals can twist nearby magnets through spin-orbit coupling (the link between an electron's motion and its spin). Where the angular momentum goes, and how these twisting forces arise, are still argued.","title":"Ultrafast magnetism and spin-orbit transport","topic_ref":null,"why":"These effects set the speed and energy limits of magnetic memory and logic."},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"414ccd6aefd9fb9a2e0725f0b4c36f9b6df00388b672673f24e80f893d2d3186","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"f02887c864250cebb8b80530f9a4fc6c9c8ad672fdfe7a9a6c279eb6c55689fb","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"9c-JpHSpRsAgE-qtSmSzyyJrSc28j_qmf1FQjqspgl86EM8zqN0SYOQLiFH26sDCdxUYTL_FNa8JXDmcZFSjDQ"},"schema":"pubphys.envelope/1"},"record_hash":"414ccd6aefd9fb9a2e0725f0b4c36f9b6df00388b672673f24e80f893d2d3186","leaf_index":179}