Journal
PHYSICAL REVIEW B
Volume 92, Issue 17, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.92.174416
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Funding
- National Science Foundation [DMR-1504449]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1504449] Funding Source: National Science Foundation
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Anisotropic magnetoresistance measurements show that the magnetization state in epitaxial Ni80Fe20/Fe50Mn50 bilayers exhibits aging over a wide range of temperatures and magnetic fields. The observed power-law time dependence indicates that aging is characterized by a wide range of activation time scales. Aging characteristics are also inconsistent with a superposition of independent activation barriers expected for Arrhenius-type relaxation. The observed effects indicate a fundamental connection with the critical phenomena in complex condensed matter systems.
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