000131537 001__ 131537
000131537 005__ 20240212142201.0
000131537 0247_ $$2doi$$a10.1039/c9nr08557b
000131537 0248_ $$2sideral$$a116481
000131537 037__ $$aART-2020-116481
000131537 041__ $$aeng
000131537 100__ $$0(orcid)0000-0002-8125-877X$$aMartínez-Pérez, M. J.$$uUniversidad de Zaragoza
000131537 245__ $$aMagnetic vortex nucleation and annihilation in bi-stable ultra-small ferromagnetic particles
000131537 260__ $$c2020
000131537 5203_ $$aVortex-mediated magnetization reversal in individual ultra-small (~100 nm) ferromagnetic particles at low temperatures is studied by nanoSQUID magnetometry. At zero applied bias field, the flux-closure magnetic state (vortex) and the quasi uniform configuration are bi-stable. This stems from the extremely small size of the nanoparticles that lies very close to the limit of single-domain formation. The analysis of the temperature-dependent (from 0.3 to 70 K) hysteresis of the magnetization allows us to infer the nature of the ground state magnetization configuration. The latter corresponds to a vortex state as also confirmed by electron holography experiments. Based on the simultaneous analysis of the vortex nucleation and annihilation data, we estimate the magnitude of the energy barriers separating the quasi single-domain and the vortex state and their field dependence. For this purpose, we use a modified power-law scaling of the energy barriers as a function of the applied bias field. These studies are essential to test the thermal and temporal stability of flux-closure states stabilized in ultra-small ferromagnets. © 2020 The Royal Society of Chemistry.
000131537 540__ $$9info:eu-repo/semantics/openAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/
000131537 590__ $$a7.79$$b2020
000131537 591__ $$aMATERIALS SCIENCE, MULTIDISCIPLINARY$$b62 / 333 = 0.186$$c2020$$dQ1$$eT1
000131537 591__ $$aPHYSICS, APPLIED$$b23 / 160 = 0.144$$c2020$$dQ1$$eT1
000131537 591__ $$aCHEMISTRY, MULTIDISCIPLINARY$$b32 / 178 = 0.18$$c2020$$dQ1$$eT1
000131537 591__ $$aNANOSCIENCE & NANOTECHNOLOGY$$b29 / 106 = 0.274$$c2020$$dQ2$$eT1
000131537 592__ $$a2.037$$b2020
000131537 593__ $$aNanoscience and Nanotechnology$$c2020$$dQ1
000131537 593__ $$aMaterials Science (miscellaneous)$$c2020$$dQ1
000131537 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000131537 700__ $$aMüller, B.
000131537 700__ $$aLin, J.
000131537 700__ $$aRodriguez, L. A.
000131537 700__ $$aSnoeck, E.
000131537 700__ $$aKleiner, R.
000131537 700__ $$0(orcid)0000-0002-7742-9329$$aSesé, J.$$uUniversidad de Zaragoza
000131537 700__ $$aKoelle, D.
000131537 7102_ $$12003$$2395$$aUniversidad de Zaragoza$$bDpto. Física Materia Condensa.$$cÁrea Física Materia Condensada
000131537 773__ $$g12, 4 (2020), 2587-2595$$pNanoscale$$tNanoscale$$x2040-3364
000131537 85641 $$uhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85078693198&doi=10.1039%2fc9nr08557b&partnerID=40&md5=f5f3825afdb6a582b3740ef6e3ed741f$$zTexto completo de la revista
000131537 8564_ $$s2566605$$uhttps://zaguan.unizar.es/record/131537/files/texto_completo.pdf$$yVersión publicada
000131537 8564_ $$s2935413$$uhttps://zaguan.unizar.es/record/131537/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
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000131537 951__ $$a2024-02-12-13:54:35
000131537 980__ $$aARTICLE