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Relation between switching time distribution and damping constant in magnetic nanostructure

Title
Relation between switching time distribution and damping constant in magnetic nanostructure
Author(s)
Moon, Jung-HwanLee, Tae YoungYou, Chun Yeol
Issued Date
2018-09
Citation
Scientific Reports, v.8
Type
Article
Keywords
NEEL THERMAL DECAYTHIN-FILM MEDIAFIELD
ISSN
2045-2322
Abstract
It is widely known that the switching time is determined by the thermal stability parameters and external perturbations such as magnetic field and/or spin polarized current in magnetic nano-structures. Since the thermal stability parameter and switching time are crucial values in the design of spin-transfer torque magnetic random access memory, the measurement of the switching time is important in the study of the switching behavior of ferromagnetic nano-structures. In this study, we focus on the distribution of the switching time. Within the limit of a large energy barrier, a simple analytical expression between damping constant and anisotropy field with switching time distribution is obtained and confirmed by numerically solving the Fokker-Planck equation. We show that the damping constant and anisotropy field can be extracted by measuring the full width half maximum of the switching time distribution in the magnetic nano-structure devices. Furthermore, the present method can be applied to not only single nano-structure, but also inhomogeneous nano-structure arrays.
URI
http://hdl.handle.net/20.500.11750/9347
DOI
10.1038/s41598-018-31299-4
Publisher
Nature Publishing Group
Related Researcher
  • 유천열 You, Chun-Yeol 화학물리학과
  • Research Interests Spintronics; Condensed Matter Physics; Magnetic Materials & Thin Films; Micromagnetic Simulations; Spin Nano-Devices
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Appears in Collections:
Department of Physics and Chemistry Spin Phenomena for Information Nano-devices(SPIN) Lab 1. Journal Articles

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