Journal
APPLIED PHYSICS LETTERS
Volume 105, Issue 4, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4891479
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Funding
- Swedish Research Council
- Knut and Alice Wallenberg Foundation
- Icelandic Nanoscience and Nanotechnology program
- Icelandic Research Fund for Graduate Students
- Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran
- U.S. Department of Energy, Office of Basic Energy Sciences [DE-AC02-98CH10886]
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We have fabricated ultra-thin disc shaped islands wherein shape anisotropy confines the moment to the island plane, creating XY-like superspins. At low temperatures, the superspins are blocked, and, as the temperature is increased, they undergo a transition into a superparamagnetic state. The onset of this dynamic superspin state scales with the diameter of the islands, and it persists up to a temperature governed by the intrinsic ordering temperature of the island material defining a range in temperature in which dynamic behavior of the magnetic islands can be obtained. (C) 2014 AIP Publishing LLC.
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