Real time dynamics in epitaxial Fe(100) disks

Autor:	J. A. C. Bland, J. Rothman, S. M. Gardiner, Y. Cheng, Yongbing Xu, M. Tselepi, F. Rousseaux
Rok vydání:	2001
Předmět:	Physics Field (physics) Condensed matter physics General Physics and Astronomy Statistical fluctuations Computational physics law.invention Switching time Scanning probe microscopy Probability theory Optical microscope law Microscopy Probability distribution
Zdroj:	Journal of Applied Physics. 89:6790-6792
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.1357144
Popis:	Real time resolved scanning Kerr microscopy has been used to study the switching dynamics of 50 μm diameter epitaxial Fe(100) disks. The measurements were performed using a sinusoidal sweeping field with a sweep rate of dH/dt=10 kOe/s. By performing repetitive one-shot measurements, we have mapped the statistical fluctuations and the probability distribution of characteristic switching parameters as the switching instant t0, and the switching speed, V. We observe a substantial difference in the parameters estimated from the average of several measurements compared to the parameters extracted from the probability distributions. This illustrates the potential risks of using averaging techniques in dynamic measurements, in addition to the loss of the statistical information. The disks were found to display an inhomogeneous switching, which is believed to be caused by defect damped motion of the domain walls and a inhomogeneous distribution of defects.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6cf860e3298ca6dcb3d1285c357417f3 https://doi.org/10.1063/1.1357144 Zobrazit plný text záznamu