Micromagnetic Studies of the Effects of Crystalline Anisotropy on the Remanent Magnetization of Ferromagnetic Nanorings

Autor:	Gabriel D. Chaves-O'Flynn, Cyrill B. Muratov
Rok vydání:	2013
Předmět:	Condensed Matter::Materials Science Magnetization Magnetic anisotropy Materials science Ferromagnetism Magnetic domain Condensed matter physics Remanence Demagnetizing field Electrical and Electronic Engineering Anisotropy Saturation (magnetic) Electronic Optical and Magnetic Materials
Zdroj:	IEEE Transactions on Magnetics. 49:3125-3128
ISSN:	1941-0069 0018-9464
DOI:	10.1109/tmag.2013.2242449
Popis:	Numerical simulations were performed for thin ferromagnetic nanorings with non-negligible anisotropy. In a thin film, the cubic crystalline anisotropy reduces to a four-fold symmetric term favoring magnetization along the ±x and ±y directions. Our numerical studies use an extension of the previously proposed algorithm for thin film micromagnetic simulations based on optimal grids for the calculation of the stray field. The relative strength of the magnetostatic energy was varied with respect to the crystalline and exchange energies. The remanent magnetization configurations were obtained for a variety of ring geometries and initial saturation orientations. The magnetocrystalline contribution causes the appearance of distinct domains in the annular structure, resulting in a new variety of magnetization configurations. Based on energetic considerations we provide a classification of possible remanent states.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e7d406e9fbf9f39f457134bb8632d572 https://doi.org/10.1109/tmag.2013.2242449 Zobrazit plný text záznamu