Coercivity extrema in melt-spun CuCo ribbons: Effects of the magnetic moment distribution

dc.creatorFerrari, EF
dc.creatorNunes, WC
dc.creatorNovak, MA
dc.date1999
dc.dateSEP 15
dc.date2014-12-02T16:24:54Z
dc.date2015-11-26T17:20:05Z
dc.date2014-12-02T16:24:54Z
dc.date2015-11-26T17:20:05Z
dc.date.accessioned2018-03-29T00:07:43Z
dc.date.available2018-03-29T00:07:43Z
dc.identifierJournal Of Applied Physics. Amer Inst Physics, v. 86, n. 6, n. 3010, n. 3014, 1999.
dc.identifier0021-8979
dc.identifierWOS:000082232400012
dc.identifier10.1063/1.371161
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/78831
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/78831
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/78831
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1283052
dc.descriptionMeasurements of magnetization loops on melt-spun CuCo ribbons revealed a minimum in the temperature dependence of the coercivity. A coherent interpretation was given through Monte Carlo simulations of a dispersed system of noninteracting, uniaxial magnetic granules embedded in a nonmagnetic matrix. The coercivity is implicitly defined by the balance between the negative magnetization of superparamagnetic granules and the remaining magnetization of blocked granules after saturation in the positive field direction. When the temperature rises in a system made of a large amount of small granules and a small amount of big granules, unblocking predominates over thermal fluctuations and the coercivity decreases until a certain temperature at which most of the small granules are superparamagnetic; above this temperature, thermal fluctuations predominate, and the coercivity increases almost linearly with the temperature until the final unblocking of the big granules. (C) 1999 American Institute of Physics. [S0021-8979(99)04618-6].
dc.description86
dc.description6
dc.description3010
dc.description3014
dc.languageen
dc.publisherAmer Inst Physics
dc.publisherWoodbury
dc.publisherEUA
dc.relationJournal Of Applied Physics
dc.relationJ. Appl. Phys.
dc.rightsaberto
dc.sourceWeb of Science
dc.subjectSuperparamagnetic Particles
dc.subjectNanocrystalline Materials
dc.subjectMonte-carlo
dc.subjectMagnetoresistance
dc.subjectAlloys
dc.subjectAnisotropy
dc.subjectField
dc.titleCoercivity extrema in melt-spun CuCo ribbons: Effects of the magnetic moment distribution
dc.typeArtículos de revistas


Este ítem pertenece a la siguiente institución