Magnetic Force Microscopy: Basic Principles and Applications

Ferri, F. A.; Pereira-da-Silva, Marcelo A.; Marega, E.

doi:10.5772/34833

Cited by 12 publications

(10 citation statements)

References 23 publications

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“…Scanning probe microscopies including magnetic force microscopy (MFM) (see e.g ., [Ferri et al ., 2012]) and spin-polarized scanning tunneling microscopy (SP-STM) [Wiesendanger, 2009] have been used to explore the behavior of chiral magnetic spin textures. Spin helices [Bode et al ., 2007] and skyrmions [Heinze et al ., 2011] induced at surfaces were first observed by SP-STM in ultrathin epitaxial transition metal films; [von Bergmann et al ., 2014] presents SP-STM studies of interface-induced chiral spin structures.…”

Section: Complex Spin Textures Induced By Interfacesmentioning

confidence: 99%

Interface-induced phenomena in magnetism

et al. 2017

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This article reviews static and dynamic interfacial effects in magnetism, focusing on interfacially-driven magnetic effects and phenomena associated with spin-orbit coupling and intrinsic symmetry breaking at interfaces. It provides a historical background and literature survey, but focuses on recent progress, identifying the most exciting new scientific results and pointing to promising future research directions. It starts with an introduction and overview of how basic magnetic properties are affected by interfaces, then turns to a discussion of charge and spin transport through and near interfaces and how these can be used to control the properties of the magnetic layer. Important concepts include spin accumulation, spin currents, spin transfer torque, and spin pumping. An overview is provided to the current state of knowledge and existing review literature on interfacial effects such as exchange bias, exchange spring magnets, spin Hall effect, oxide heterostructures, and topological insulators. The article highlights recent discoveries of interface-induced magnetism and non-collinear spin textures, non-linear dynamics including spin torque transfer and magnetization reversal induced by interfaces, and interfacial effects in ultrafast magnetization processes.

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Section: Complex Spin Textures Induced By Interfacesmentioning

confidence: 99%

Interface-induced phenomena in magnetism

et al. 2017

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“…La comprensión del comportamiento microestructural de componentes o elementos industriales de aceros estructurales bajo condiciones exigentes de operación ha sido objeto de múltiples estudios [3,4,16,22,23], que dan cuenta de cómo la microscopia de fuerza atómica presenta grandes ventajas para la obtención rápida y confiable de datos, lo anterior debido a la preparación básica que requieren las superficies a analizar y por la posibilidad de emplear versiones portátiles de estos equipos directamente en el campo, permitiendo la obtención de información a nivel nanométrico de la evolución microestructural de una componente en servicio y proceder a la evaluación de su condición presente de operación y su vida remanente [22][23][24][25].…”

Section: Identificación De Fases Y Precipitados Por Mfa En Uniones Deunclassified

Identificación de Fases y Precipitados por MFA en Uniones de Acero Inoxidable Dúplex

López¹,

Delgado²,

Torres

et al. 2016

Soldag. insp.

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Este es un artículo publicado en acceso (Open Access) abierto bajo la licencia Creative Commons Attribution Non-Commercial, que permite su uso, distribución y reproducción en cualquier medio, sin restricciones siempre que sin fines comerciales y que el trabajo original sea debidamente citado.Recibido: 08 Jun., 2016 Aprobado: 27 Jun., 2016 E-mail: mherrera@comimsa.com (MEHL)Resumen: La Microscopía de Fuerza Atómica (MFA), técnica de caracterización que genera imágenes topográficas de superficies a muy altas resoluciones, opera registrando los detalles de relieve superficial del material con un cantiléver que se mueve sobre la muestra, mientras un detector piezoeléctrico monitorea los cambios de altura. Ésta técnica, adquiere relevancia en el campo de la identificación de fases, partículas y precipitados a niveles de nanoescala por lo que se propone para su identificación en la zona de fusión de componentes soldados y para la identificación temprana de fallas por agrietamiento. Es una técnica que no requiere de muestras conductoras, o la especial preparación metalográfica de probetas como es el caso de la microscopia electrónica. El material de estudio es un acero inoxidable dúplex 2205, unido por arco metálico y electrodo de tungsteno (GTAW). Al material soldado se le practicó ensayo de tensión. Las probetas fueron caracterizadas mediante microscopia óptica, microscopía electrónica de barrido, microscopía de fuerza atómica y pruebas de nanoindentación. Los resultados se concentran en la identificación de las características magnéticas, topográficas y dureza específicos de cada una de las fases, partículas y regiones presentes en el metal base, zona de fusión y la zona deformada por la fractura.Palabras clave: Microscopia de fuerza atómica; Austenita; Acero inoxidable dúplex; Ferrita; GTAW; nanointentación. Identification of Phases and Precipitates by AFM in Duplex Stainless Steel UnionsAbstract: Atomic Force Microscopy (AFM) is a characterization technique that generates topographic images of surfaces at very high resolutions, and operates recording details of surface relief of material with a cantilever that moves on the sample, while a piezoelectric detector monitors changes in height. It acquires relevance in the field of identification phase, particles and precipitation at nanoscale level so, it is proposed for identification in the fusion zone of welded components and for the early identification of failures by cracking. It is a technique that does not require conductive samples, or special preparation of metallographic specimens such as electron microscopy. The study material is a duplex stainless steel 2205, joined by Gas Metal Arc Welding (GTAW). This material was performed tensile test. The specimens were characterized by optical microscopy, scanning electron microscopy, atomic force microscopy and nanoindentation tests. Results focus on the identification of the magnetic characteristics, and specific topography of each of the phases, regions and particles present in the base metal and weld zone as well ...

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“…An area currently lacking in micromagnetics is the capability of simulating mechanical motion of magnets and the interplay of motion and the domain dynamics of magnets moving relative to each other. The relative motion of small-scale magnets is relevant in studying phenomena such as magnetic friction [7][8][9][10][11], and for applications such as magnetic force microscopy [12], and micro-and nanomanipulation [13,14]. Despite the scientific interest in these areas, simulation frameworks capable of general micromagnetic simulations coupled with the motion dynamics of the magnets, to the authors' knowledge, do not exist.…”

Section: Introductionmentioning

confidence: 99%

Moving magnets in a micromagnetic finite-difference framework

Rissanen

Laurson

2018

Phys. Rev. E

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We present a method and an implementation for smooth linear motion in a finite-difference-based micromagnetic simulation code, to be used in simulating magnetic friction and other phenomena involving moving microscale magnets. Our aim is to accurately simulate the magnetization dynamics and relative motion of magnets while retaining high computational speed. To this end, we combine techniques for fast scalar potential calculation and cubic b-spline interpolation, parallelizing them on a graphics processing unit (GPU). The implementation also includes the possibility of explicitly simulating eddy currents in the case of conducting magnets. We test our implementation by providing numerical examples of stick-slip motion of thin films pulled by a spring and the effect of eddy currents on the switching time of magnetic nanocubes.

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Magnetic Force Microscopy: Basic Principles and Applications

Cited by 12 publications

References 23 publications

Interface-induced phenomena in magnetism

Interface-induced phenomena in magnetism

Identificación de Fases y Precipitados por MFA en Uniones de Acero Inoxidable Dúplex

Moving magnets in a micromagnetic finite-difference framework

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