NanoSQUID Magnetometry on Individual As-grown and Annealed Co Nanowires at Variable Temperature

Martínez-Pérez, M.J. ; Pablo-Navarro, J. (Universidad de Zaragoza) ; Müller, B. ; Kleiner, R. ; Magén, C. (Universidad de Zaragoza) ; Koelle, D. ; De Teresa, J.M. (Universidad de Zaragoza) ; Sesé, J. (Universidad de Zaragoza)

Resumen: Performing magnetization studies on individual nanoparticles is a highly demanding task, especially when measurements need to be carried out under large sweeping magnetic fields or variable temperature. Yet, characterization under varying ambient conditions is paramount in order to fully understand the magnetic behavior of these objects, e.g., the formation of nonuniform states or the mechanisms leading to magnetization reversal and thermal stability. This, in turn, is necessary for the integration of magnetic nanoparticles and nanowires into useful devices, e.g., spin-valves, racetrack memories, or magnetic tip probes. Here, we show that nanosuperconducting quantum interference devices based on high critical temperature superconductors are particularly well suited for this task. We have successfully characterized a number of individual Co nanowires grown through focused electron beam induced deposition and subsequently annealed at different temperatures. Magnetization measurements performed under sweeping magnetic fields (up to 100 mT) and variable temperature (1.4-80 K) underscore the intrinsic structural and chemical differences between these nanowires. These point to significant changes in the crystalline structure and the resulting effective magnetic anisotropy of the nanowires, and to the nucleation and subsequent vanishing of antiferromagnetic species within the nanowires annealed at different temperatures.

Idioma: Inglés

DOI: 10.1021/acs.nanolett.8b03329

Año: 2018

Publicado en: Nano Letters 18, 12 (2018), 7674-7682
ISSN: 1530-6984

Factor impacto JCR: 12.279 (2018)

Categ. JCR: CHEMISTRY, PHYSICAL rank: 10 / 148 = 0.068 (2018) - Q1 - T1
Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 19 / 293 = 0.065 (2018) - Q1 - T1
Categ. JCR: NANOSCIENCE & NANOTECHNOLOGY rank: 10 / 94 = 0.106 (2018) - Q1 - T1
Categ. JCR: PHYSICS, CONDENSED MATTER rank: 8 / 68 = 0.118 (2018) - Q1 - T1
Categ. JCR: CHEMISTRY, MULTIDISCIPLINARY rank: 16 / 172 = 0.093 (2018) - Q1 - T1
Categ. JCR: PHYSICS, APPLIED rank: 9 / 148 = 0.061 (2018) - Q1 - T1

Factor impacto SCIMAGO: 6.211 - Bioengineering (Q1) - Chemistry (miscellaneous) (Q1) - Nanoscience and Nanotechnology (Q1) - Materials Science (miscellaneous) (Q1) - Mechanical Engineering (Q1) - Condensed Matter Physics (Q1)

Financiación: info:eu-repo/grantAgreement/EUR/COST-Action/CA16218
Financiación: info:eu-repo/grantAgreement/EUR/COST-Project/CELINA
Financiación: info:eu-repo/grantAgreement/ES/DGA/E09-17R
Financiación: info:eu-repo/grantAgreement/ES/DGA/E13-17R
Financiación: info:eu-repo/grantAgreement/ES/DGA/E26
Financiación: info:eu-repo/grantAgreement/ES/MINECO-FSE/BOE-12-6-15
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2014-51982-C2
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2015-64083-R
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2015-69725-REDT
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2015-73914-JIN
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2017-82970-C2-1-R
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2017-82970-C2-2-R

Tipo y forma: Article (PostPrint)

Área (Departamento): Área Cienc.Mater. Ingen.Metal. (Dpto. Ciencia Tecnol.Mater.Fl.)
Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)