Magnetization reversal in cobalt‐aluminum fine‐particle ferromagnets: Microstructure and coercivity

Autor:	A. M. Zeltser, W. A. Soffa
Rok vydání:	1990
Předmět:	Condensed Matter::Materials Science Magnetization Materials science Ferromagnetism Magnetic domain Condensed matter physics Electron diffraction General Physics and Astronomy Coercivity Single domain Magnetocrystalline anisotropy Magnetic hysteresis
Zdroj:	Journal of Applied Physics. 67:6958-6967
ISSN:	1089-7550 0021-8979
Popis:	The magnetic age hardening produced by decomposition of a β‐CoAl(B2) alloy has been studied by correlating the microstructure with the changes in magnetic properties during aging. A model based on coherent rotation has been developed to describe quantitatively the intrinsic coercivity of these fine‐particle ferromagnets as well as the temperature dependence of the coercivity over the temperature range from 77 to 757 K. The model incorporates both magnetocrystalline anisotropy constants K1 and K2 in addition to the shape anisotropy of the elongated single‐domain particles of metastable HCP cobalt which precipitate from solid solution during heat treatment. The magnetic properties of the particles are shown to depend critically on the crystallography of the solid‐state transformation and particle morphology which were determined by transmission electron microscopy and diffraction.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b0b13c1c04971005ed0847a47d732abc https://doi.org/10.1063/1.345040 Zobrazit plný text záznamu