期刊
PHYSICAL REVIEW B
卷 88, 期 17, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.88.174402
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资金
- U.S. National Science Foundation [DMR-0520491, DMR-1104753]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1104753] Funding Source: National Science Foundation
Bloch points are magnetic topological defects. The discrete nature of a magnetic lattice creates a periodic potential that can pin a Bloch point. The pinning force is of the order of the exchange constant, a few piconewtons in a typical ferromagnet (permalloy). A domain wall containing a Bloch point can have a sizable depinning field in the tens of oersteds.
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