Fabrication and characterization of cobalt microbars
Magnetic materials have been widely used in applications such as data storage, magnetic tunnel junctions and spin valve structures. In the present work, we explore the magnetic properties of various millimeter size arrays of magnetic microbars. For this study, we focused on Cobalt microbars fabricat...
- Autores:
-
Useche Reyes, Diego Hernando
- Tipo de recurso:
- Fecha de publicación:
- 2017
- Institución:
- Universidad de los Andes
- Repositorio:
- Séneca: repositorio Uniandes
- Idioma:
- eng
- OAI Identifier:
- oai:repositorio.uniandes.edu.co:1992/61530
- Acceso en línea:
- http://hdl.handle.net/1992/61530
- Palabra clave:
- Magnetismo
Materiales magnéticos
- Rights
- openAccess
- License
- http://creativecommons.org/licenses/by-nc-sa/4.0/
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Al consultar y hacer uso de este recurso, está aceptando las condiciones de uso establecidas por los autores.http://creativecommons.org/licenses/by-nc-sa/4.0/info:eu-repo/semantics/openAccesshttp://purl.org/coar/access_right/c_abf2Patiño Zapata, Edgar Javier12d666f4-45f8-46bb-9477-43b38ab165c2400Useche Reyes, Diego Hernandofb21612f-8d51-44a4-b6aa-f5086fe2dd08500Colauto, FabianoRamírez Rojas, Juan Gabriel2022-09-26T22:24:40Z2022-09-26T22:24:40Z2017http://hdl.handle.net/1992/61530instname:Universidad de los Andesreponame:Repositorio Institucional Sénecarepourl:https://repositorio.uniandes.edu.co/795239-1001Magnetic materials have been widely used in applications such as data storage, magnetic tunnel junctions and spin valve structures. In the present work, we explore the magnetic properties of various millimeter size arrays of magnetic microbars. For this study, we focused on Cobalt microbars fabricated using photolithography, thermal evaporation, sputtering and electron gun techniques. Magnetization measurements as a function of angle were performed on microbars samples which dier slightly in their dimensions. The measurements were carried out using vibrating sample magnetometry (VSM). Also, computer simulations in OOMMF were done to simulate the experimental outcomes. As results, when the applied eld was parallel to the microbars the maximum coercivity was found and decreased slightly as the eld rotated towards the perpendicular direction. It was also found a sheared hysteresis loop in three of the samples.Los materiales magnéticos han sido ampliamente usados en aplicaciones como almacenamiento de datos, junturas túnel, y válvulas de spin. En este trabajo exploramos las propiedades magnéticas de varias muestras de microbarras de cobalto. Las microbarras magnéticas fueron fabricadas con los métodos de fotolitografía, evaporación térmica, sputtering, y cañón de electrones. Así mismo, realizamos mediciones de la magnetización de las muestras usando el VSM (vibrating sample magnetometer). Además, se realizaron simulaciones computacionales en OOMMF para explicar los resultados experimentales. Como resultados generales, cuando el campo magnético estaba paralelo a las barras se encontró máxima coercividad, y esta disminuía al rotar el campo en la dirección perpendicular. También, se encontraron unos pasos en los ciclos de histéresis para tres muestras cuando el campo es paralelo a las barras.--Tomado del Formato de Documento de Grado.Magíster en FísicaMaestría60 hojasapplication/pdfengUniversidad de los AndesMaestría en Ciencias - FísicaFacultad de CienciasDepartamento de FísicaFabrication and characterization of cobalt microbarsTrabajo de grado - Maestríainfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/acceptedVersionTexthttp://purl.org/redcol/resource_type/TMMagnetismoMateriales magnéticos201016183PublicationTHUMBNAIL12919.pdf.jpg12919.pdf.jpgIM Thumbnailimage/jpeg6624https://repositorio.uniandes.edu.co/bitstreams/171eab49-d64c-4bcc-91ba-19916337d6be/download80608317a4e8add7092cc446fc88398eMD53TEXT12919.pdf.txt12919.pdf.txtExtracted texttext/plain63175https://repositorio.uniandes.edu.co/bitstreams/751ea2e6-93eb-4330-8ca0-e271c1f204fc/downloade9e939577f55791a86c5f511a6e54a6cMD52ORIGINAL12919.pdfapplication/pdf5491326https://repositorio.uniandes.edu.co/bitstreams/a9eb7cbe-1525-427e-b4ee-d5e246b8ed64/downloadfe25a75e1048c886cbebc1a10d8a9fe2MD511992/61530oai:repositorio.uniandes.edu.co:1992/615302023-10-10 17:36:32.994http://creativecommons.org/licenses/by-nc-sa/4.0/open.accesshttps://repositorio.uniandes.edu.coRepositorio institucional Sénecaadminrepositorio@uniandes.edu.co |
| dc.title.spa.fl_str_mv |
Fabrication and characterization of cobalt microbars |
| title |
Fabrication and characterization of cobalt microbars |
| spellingShingle |
Fabrication and characterization of cobalt microbars Magnetismo Materiales magnéticos |
| title_short |
Fabrication and characterization of cobalt microbars |
| title_full |
Fabrication and characterization of cobalt microbars |
| title_fullStr |
Fabrication and characterization of cobalt microbars |
| title_full_unstemmed |
Fabrication and characterization of cobalt microbars |
| title_sort |
Fabrication and characterization of cobalt microbars |
| dc.creator.fl_str_mv |
Useche Reyes, Diego Hernando |
| dc.contributor.advisor.none.fl_str_mv |
Patiño Zapata, Edgar Javier |
| dc.contributor.author.none.fl_str_mv |
Useche Reyes, Diego Hernando |
| dc.contributor.jury.none.fl_str_mv |
Colauto, Fabiano Ramírez Rojas, Juan Gabriel |
| dc.subject.keyword.spa.fl_str_mv |
Magnetismo Materiales magnéticos |
| topic |
Magnetismo Materiales magnéticos |
| description |
Magnetic materials have been widely used in applications such as data storage, magnetic tunnel junctions and spin valve structures. In the present work, we explore the magnetic properties of various millimeter size arrays of magnetic microbars. For this study, we focused on Cobalt microbars fabricated using photolithography, thermal evaporation, sputtering and electron gun techniques. Magnetization measurements as a function of angle were performed on microbars samples which dier slightly in their dimensions. The measurements were carried out using vibrating sample magnetometry (VSM). Also, computer simulations in OOMMF were done to simulate the experimental outcomes. As results, when the applied eld was parallel to the microbars the maximum coercivity was found and decreased slightly as the eld rotated towards the perpendicular direction. It was also found a sheared hysteresis loop in three of the samples. |
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2017 |
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2017 |
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2022-09-26T22:24:40Z |
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Trabajo de grado - Maestría |
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info:eu-repo/semantics/masterThesis |
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info:eu-repo/semantics/acceptedVersion |
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Universidad de los Andes |
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Maestría en Ciencias - Física |
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Departamento de Física |
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