Magnetic imaging and statistical analysis of the metamagnetic phase transition of FeRh with electron spins in diamond
| Autor: | Rajasekhar Medapalli, D. Afanasiev, Toeno van der Sar, Brecht G. Simon, Iacopo Bertelli, Guillermo Nava Antonio |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Phase transition Materials science Condensed matter physics Condensed Matter - Mesoscale and Nanoscale Physics Magnetometer Transition temperature General Physics and Astronomy FOS: Physical sciences 02 engineering and technology 021001 nanoscience & nanotechnology Magnetocrystalline anisotropy 01 natural sciences law.invention Magnetic field Condensed Matter - Other Condensed Matter Magnetic Phenomena Ferromagnetism law 0103 physical sciences Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Antiferromagnetism 0210 nano-technology Other Condensed Matter (cond-mat.other) |
| Zdroj: | Journal of Applied Physics, 129(22) |
| ISSN: | 0021-8979 |
| DOI: | 10.1063/5.0051791 |
| Popis: | Magnetic imaging based on nitrogen-vacancy (NV) centers in diamond has emerged as a powerful tool for probing magnetic phenomena in fields ranging from biology to physics. A key strength of NV sensing is its local-probe nature, enabling high-resolution spatial images of magnetic stray fields emanating from a sample. However, this local character can also form a drawback for analysing the global properties of a system, such as a phase transition temperature. Here, we address this challenge by using statistical analyses of magnetic-field maps to characterize the first-order temperature-driven metamagnetic phase transition from the antiferromagnetic to the ferromagnetic state in FeRh. After imaging the phase transition and identifying the regimes of nucleation, growth, and coalescence of ferromagnetic domains, we statistically characterize the spatial magnetic-field maps to extract the transition temperature and thermal hysteresis width. By analysing the spatial correlations of the maps and their dependence on an external magnetic field, we investigate the magnetocrystalline anisotropy and detect a reorientation of domain walls across the phase transition. The employed statistical approach can be extended to the study of other magnetic phenomena with NV magnetometry or other sensing techniques. Comment: 11 pages, 4 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|