Magnetic properties and interactions of single-domain nanomagnets in a periodic array

Autor:	Holger Schmidt, T. A. Savas, M. C. Abraham, Caroline A. Ross, Rajeev J. Ram, Henry I. Smith
Rok vydání:	2001
Předmět:	Condensed Matter::Materials Science Materials science Magnetic domain Field (physics) Ferromagnetism Condensed matter physics General Physics and Astronomy Single domain Coercivity Magnetic force microscope Magnetic hysteresis Nanomagnet
Zdroj:	Journal of Applied Physics. 89:5667-5670
ISSN:	1089-7550 0021-8979
Popis:	Macroscopic and microscopic switching characteristics are obtained for 100 nm period arrays of Ni nanomagnets with a mean switching field (coercive field) of 710 Oe. Magnetic force microscopy in combination with micromagnetic theory shows that inhomogeneities in the particle shapes result in an intrinsic standard deviation in switching fields of 105 Oe, while the interactions between neighboring nanomagnets broaden the distribution to 276 Oe, equivalent to a squareness of 0.8 in the bulk hysteresis loop. The switching field distribution is consistent with curling as the switching mechanism.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1103439dbf4620f11bb26e6123fd27ee https://doi.org/10.1063/1.1359750 Zobrazit plný text záznamu