Thermally activated demagnetization in Co/Ni multilayers involving discrete identifiable stages

Autor:	Antonio Hernando, J L Muñoz, Jose J. Gonzalez, Federico Cebollada, J. J. Freijo, A. Salcedo
Rok vydání:	1999
Předmět:	Arrhenius equation Materials science Physics and Astronomy (miscellaneous) Condensed matter physics Demagnetizing field chemistry.chemical_element Magnetic hysteresis Moment (mathematics) symbols.namesake Nickel Dipole chemistry Ferromagnetism Chemical physics symbols Relaxation (physics)
Zdroj:	Applied Physics Letters. 75:847-849
ISSN:	1077-3118 0003-6951
DOI:	10.1063/1.124533
Popis:	We present data, obtained from measured Co/Ni multilayers, that indicate that the magnetic relaxation processes take place through a nucleation-coalescence sequence, and thus crucially implicates the existance of exchange and dipolar interactions. Depending on the layer thickness the relaxation proceeds either through a single global stage or through several partial ones. In both cases the relaxation stages involve a time lapse during which the macroscopic state of the system evolves very slowly, followed by a sharp variation of the total moment of the sample. Such behavior clearly implies a significant departure from the conventionally accepted Arrhenius relaxation kinetics.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9603eaf321e137e68689b2f2aee36f37 https://doi.org/10.1063/1.124533 Zobrazit plný text záznamu