1. Imaging the magnetic structures of artificial quasicrystal magnets using resonant coherent diffraction of circularly polarized X-rays
- Author
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Chulho Jung, Barry Farmer, L. E. De Long, Ki Bong Lee, Daeho Sung, David Keavney, Hee-Sung Han, V. S. Bhat, Ki-Suk Lee, Changyong Song, Dong Ryeol Lee, Byeong-Gwan Cho, and Wonhyuk Jo
- Subjects
Free electron model ,Diffraction ,Materials science ,Magnetic structure ,business.industry ,Physics::Optics ,Quasicrystal ,02 engineering and technology ,021001 nanoscience & nanotechnology ,01 natural sciences ,Speckle pattern ,Magnet ,0103 physical sciences ,Femtosecond ,Optoelectronics ,General Materials Science ,010306 general physics ,0210 nano-technology ,business ,Ultrashort pulse - Abstract
Unraveling nanoscale spin structures has long been an important activity addressing various scientific interests, that are also readily adaptable to technological applications. This has invigorated the development of versatile nanoprobes suitable for imaging specimens under native conditions. Here we have demonstrated the resonant coherent diffraction of an artificial quasicrystal magnet with circularly polarized X-rays. The nanoscale magnetic structure was revealed from X-ray speckle patterns by comparing with micromagnetic simulations, as a step toward understanding the intricate relationship between the chemical and spin structures in an aperiodic quasicrystal lattice. Femtosecond X-ray pulses from free electron lasers are expected to immediately extend the current work to nanoscale structure investigations of ultrafast spin dynamics, surpassing the present spatio-temporal resolution.
- Published
- 2018
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