X-ray imaging and multiferroic coupling of cycloidal magnetic domains in ferroelectric monodomain BiFeO3
| Autor: | R. J. Bean, Sang-Wook Cheong, L. C. Chapon, Paolo Barone, Yoon Seok Oh, R. D. Johnson, S. Picozzi, Paolo G. Radaelli, A. Bombardi |
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| Rok vydání: | 2013 |
| Předmět: |
Diffraction
Physics Condensed matter physics Magnetic domain Strongly Correlated Electrons (cond-mat.str-el) Scattering General Physics and Astronomy FOS: Physical sciences 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Ferroelectricity 3. Good health Condensed Matter - Strongly Correlated Electrons Magnetization Domain wall (magnetism) 0103 physical sciences Multiferroics 010306 general physics 0210 nano-technology Circular polarization |
| DOI: | 10.48550/arxiv.1303.6987 |
| Popis: | Magnetic domains at the surface of a ferroelectric monodomain BiFeO3 single crystal have been imaged by hard X-ray magnetic scattering. Magnetic domains up to several hundred microns in size have been observed, corresponding to cycloidal modulations of the magnetization along the wave-vector k=2\pi(\delta,\delta,0) and symmetry equivalent directions. The rotation direction of the magnetization in all magnetic domains, determined by diffraction of circularly polarized light, was found to be unique and in agreement with predictions of a combined approach based on a spin-model complemented by relativistic density-functional simulations. Imaging of the surface shows that the largest adjacent domains display a 120 degree vortex structure. Comment: Published in Physical Review Letters |
| Databáze: | OpenAIRE |
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