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Rapid Kerr imaging characterization of the magnetic properties of two-dimensional ferromagnetic Fe3GeTe2
- Source :
- Applied Physics Letters. 117:192401
- Publication Year :
- 2020
- Publisher :
- AIP Publishing, 2020.
-
Abstract
- Van der Waals (vdW) ferromagnetic materials have attracted considerable attention in the nanomaterial community, which could provide a unique platform to study magnetism at the nanoscale. Along this direction, many interesting results have been reported, including the electric field control of magnetism and topological spin textures. In this report, we present a rapid and spatially resolved imaging method to study the dimensionality-dependent magnetic properties of Fe3GeTe2 (FGT) nanoflakes. Our method is named as polar magneto-optical Kerr imaging microscopy magnetometry (p-MIMM), which is made possible by analyzing the intensity evolution of wide-field polar magneto-optical Kerr effect (MOKE) images that were collected by varying magnetic fields, thicknesses, and temperatures. In particular, spatially resolved MOKE hysteresis loops can be acquired in the FGT nanoflakes with a submicrometer resolution. By analyzing the evolution of the relative (saturated) MOKE intensity as a function of temperature, we further study the critical exponent and universality class and its dependence on the FGT nanoflake thickness. Combining the polar MOKE images with the calculated MOKE hysteresis loops, a detailed magnetic phase diagram summarizing an evolution of the stripe domain, single domain, and paramagnetic state is further validated. Our results suggest that the wide-field p-MIMM can be conveniently used for rapidly examining the magnetic properties of versatile vdW magnetic materials.
- Subjects :
- 010302 applied physics
Materials science
Kerr effect
Physics and Astronomy (miscellaneous)
Condensed matter physics
Magnetism
Magnetometer
02 engineering and technology
021001 nanoscience & nanotechnology
01 natural sciences
law.invention
Magnetic field
Condensed Matter::Materials Science
Hysteresis
Paramagnetism
Ferromagnetism
law
0103 physical sciences
Single domain
0210 nano-technology
Subjects
Details
- ISSN :
- 10773118 and 00036951
- Volume :
- 117
- Database :
- OpenAIRE
- Journal :
- Applied Physics Letters
- Accession number :
- edsair.doi...........ac5687743b7af0fa8f2868c482c2f902