Thermal spin transport effects and long-range magnetic coupling in Co/Nb/Co trilayers
Spin manipulation and transport has been a widely studied topic for the opportunities it presents to the data storage industry. With an array of different methods ranging from spin wave optimization and control of magnetoresistance up to the transport of spins with heat and even sound, the possibili...
- Autores:
-
González Sánchez, Víctor Hugo
- Tipo de recurso:
- Fecha de publicación:
- 2020
- Institución:
- Universidad de los Andes
- Repositorio:
- Séneca: repositorio Uniandes
- Idioma:
- eng
- OAI Identifier:
- oai:repositorio.uniandes.edu.co:1992/48574
- Acceso en línea:
- http://hdl.handle.net/1992/48574
- Palabra clave:
- Espintrónica
Magnetorresistencia
Magnetismo
Física
- Rights
- openAccess
- License
- http://creativecommons.org/licenses/by-nc-sa/4.0/
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| dc.title.es_CO.fl_str_mv |
Thermal spin transport effects and long-range magnetic coupling in Co/Nb/Co trilayers |
| title |
Thermal spin transport effects and long-range magnetic coupling in Co/Nb/Co trilayers |
| spellingShingle |
Thermal spin transport effects and long-range magnetic coupling in Co/Nb/Co trilayers Espintrónica Magnetorresistencia Magnetismo Física |
| title_short |
Thermal spin transport effects and long-range magnetic coupling in Co/Nb/Co trilayers |
| title_full |
Thermal spin transport effects and long-range magnetic coupling in Co/Nb/Co trilayers |
| title_fullStr |
Thermal spin transport effects and long-range magnetic coupling in Co/Nb/Co trilayers |
| title_full_unstemmed |
Thermal spin transport effects and long-range magnetic coupling in Co/Nb/Co trilayers |
| title_sort |
Thermal spin transport effects and long-range magnetic coupling in Co/Nb/Co trilayers |
| dc.creator.fl_str_mv |
González Sánchez, Víctor Hugo |
| dc.contributor.advisor.none.fl_str_mv |
Ramos Rodríguez, Edwin Ramírez Rojas, Juan Gabriel |
| dc.contributor.author.none.fl_str_mv |
González Sánchez, Víctor Hugo |
| dc.contributor.jury.none.fl_str_mv |
Arnache Olmos, Oscar Luis Mendoza Arenas, Juan José |
| dc.subject.armarc.es_CO.fl_str_mv |
Espintrónica Magnetorresistencia Magnetismo |
| topic |
Espintrónica Magnetorresistencia Magnetismo Física |
| dc.subject.themes.none.fl_str_mv |
Física |
| description |
Spin manipulation and transport has been a widely studied topic for the opportunities it presents to the data storage industry. With an array of different methods ranging from spin wave optimization and control of magnetoresistance up to the transport of spins with heat and even sound, the possibilities seem endless. In this work, we grow and study magnetically and thermally induced changes in resistance in textured Co/Nb/Co trilayers. Using anisotropic magnetoresistance (AMR) and cryogenic magnetoresistance we are able to study the interaction and transport properties of the spins within the ferromagnetic (FM) layers in the presence of an external magnetic field. We found a long-range exchange coupling between the magnetic moments of the Co layers as far as 10 nm. We also found that this coupling depends on the separation of the layers (i.e. the thickness of the Nb layer) and is a non-monotonic decreasing function of that separation. This behavior is expected if there is interlayer exchange coupling (IEC). The magnetic polarization within the sample is affected by this coupling as well. It is studied using two different, complimentary, methods: vibrating sample magnetometer (VSM) and magneto-optic Kerr effect (Moke). We found that the shape of the hysteresis curves also reflect the presence of IEC. Furthermore, we studied the influence of temperature on this behavior and found Hall and Nernst effects just as predicted by previous works. Both of these facts point towards a strongly coupled interaction that can be exploited for spin transport applications as well as finely tuned magnetic sensors |
| publishDate |
2020 |
| dc.date.issued.es_CO.fl_str_mv |
2020 |
| dc.date.accessioned.none.fl_str_mv |
2021-02-18T12:24:14Z |
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2021-02-18T12:24:14Z |
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Trabajo de grado - Maestría |
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http://purl.org/coar/version/c_970fb48d4fbd8a85 |
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info:eu-repo/semantics/masterThesis |
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Text |
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http://purl.org/redcol/resource_type/TM |
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http://hdl.handle.net/1992/48574 |
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u834046.pdf |
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instname:Universidad de los Andes |
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reponame:Repositorio Institucional Séneca |
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repourl:https://repositorio.uniandes.edu.co/ |
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http://hdl.handle.net/1992/48574 |
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u834046.pdf instname:Universidad de los Andes reponame:Repositorio Institucional Séneca repourl:https://repositorio.uniandes.edu.co/ |
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eng |
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eng |
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http://creativecommons.org/licenses/by-nc-sa/4.0/ |
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info:eu-repo/semantics/openAccess |
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http://purl.org/coar/access_right/c_abf2 |
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http://creativecommons.org/licenses/by-nc-sa/4.0/ http://purl.org/coar/access_right/c_abf2 |
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openAccess |
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74 hojas |
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application/pdf |
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Universidad de los Andes |
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Maestría en Ciencias - Física |
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Facultad de Ciencias |
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Departamento de Física |
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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_abf2Ramos Rodríguez, Edwin9371ce16-7111-49ce-b173-d7f9aaadca9f500Ramírez Rojas, Juan Gabrielvirtual::14623-1González Sánchez, Víctor Hugo932df89c-da9f-43e4-be94-4b4548933da1500Arnache Olmos, Oscar LuisMendoza Arenas, Juan José2021-02-18T12:24:14Z2021-02-18T12:24:14Z2020http://hdl.handle.net/1992/48574u834046.pdfinstname:Universidad de los Andesreponame:Repositorio Institucional Sénecarepourl:https://repositorio.uniandes.edu.co/Spin manipulation and transport has been a widely studied topic for the opportunities it presents to the data storage industry. With an array of different methods ranging from spin wave optimization and control of magnetoresistance up to the transport of spins with heat and even sound, the possibilities seem endless. In this work, we grow and study magnetically and thermally induced changes in resistance in textured Co/Nb/Co trilayers. Using anisotropic magnetoresistance (AMR) and cryogenic magnetoresistance we are able to study the interaction and transport properties of the spins within the ferromagnetic (FM) layers in the presence of an external magnetic field. We found a long-range exchange coupling between the magnetic moments of the Co layers as far as 10 nm. We also found that this coupling depends on the separation of the layers (i.e. the thickness of the Nb layer) and is a non-monotonic decreasing function of that separation. This behavior is expected if there is interlayer exchange coupling (IEC). The magnetic polarization within the sample is affected by this coupling as well. It is studied using two different, complimentary, methods: vibrating sample magnetometer (VSM) and magneto-optic Kerr effect (Moke). We found that the shape of the hysteresis curves also reflect the presence of IEC. Furthermore, we studied the influence of temperature on this behavior and found Hall and Nernst effects just as predicted by previous works. Both of these facts point towards a strongly coupled interaction that can be exploited for spin transport applications as well as finely tuned magnetic sensorsEl transporte y manipulación de espín ha sido un tema ampliamente estudiado por las oportunidades que presenta a la industria del amacenamiento de datos. Con un arreglo de diferentes métodos: desde optimización de ondas de espín y control de la magnetorresistenca hasta el transporte de espines con calor e incluso sonido, las posibilidades parecen interminables. En este trabajo, crecemos y estudiamos cambios inducidos magnética y térmicamente en la resistencia de tricapas texturizadas de Co/Nb/Co. Utilizando magnetorresistencia anisotrópica (AMR, por sus siglas en inglés) y magnetorresistancia criogénica, podemos estudiar las propiedades de interacción y transporte de los espines dentro de las capas ferromagnéticas (FM) en presencia de un campo magnético externo. Encontramos un acoplamiento de intercambio de largo alcance entre los momentos magnéticos de las capas (i.e. el grosor de la capa de Nb) y es una función no monotónica decreciente de dicha separación. Este comportamiento es esperado si hay un acoplamiento de intercambio intercapa (IEC, en inglés). La polarización magnética dentro de la muestra también es afectada por este acoplamiento. Es estudiada utilizando dos métodos diferentes y complementarios: magnetómetro de muestra vibrante (VSM) y efecto Kerr magneto-óptico (Moke). Encontramos que la forma de las curvas de histéresis también reflejan la presencia del IEC. Además, estudiamos la influencia de la temperatura en este comportamiento y encontramos efectos Hall y Nernst, igual a lo predicho por trabajos previos. Ambos de estos hecho apuntan a una interacción fuertemente acoplada que puede ser explotada para aplicaciones de transporte de espín como en sensores magnéticos finamente ajustadosMagíster en FísicaMaestría74 hojasapplication/pdfengUniversidad de los AndesMaestría en Ciencias - FísicaFacultad de CienciasDepartamento de Físicainstname:Universidad de los Andesreponame:Repositorio Institucional SénecaThermal spin transport effects and long-range magnetic coupling in Co/Nb/Co trilayersTrabajo de grado - Maestríainfo:eu-repo/semantics/masterThesishttp://purl.org/coar/version/c_970fb48d4fbd8a85Texthttp://purl.org/redcol/resource_type/TMEspintrónicaMagnetorresistenciaMagnetismoFísicaPublication6ce2beec-157c-481d-8faa-d682fa74a732virtual::14623-16ce2beec-157c-481d-8faa-d682fa74a732virtual::14623-1https://scienti.minciencias.gov.co/cvlac/visualizador/generarCurriculoCv.do?cod_rh=0000154482virtual::14623-1ORIGINALu834046.pdfapplication/pdf11848298https://repositorio.uniandes.edu.co/bitstreams/8db3c459-cfd3-4878-8d25-1bc4d35f9ebd/download923804bcbc6b646eb1581cfd7b98d8bbMD51TEXTu834046.pdf.txtu834046.pdf.txtExtracted texttext/plain172436https://repositorio.uniandes.edu.co/bitstreams/4517ec7a-cd32-438d-ad88-77c748deb774/download9fa874b51b5ff0ba0ea053ed0a60635fMD54THUMBNAILu834046.pdf.jpgu834046.pdf.jpgIM Thumbnailimage/jpeg6743https://repositorio.uniandes.edu.co/bitstreams/72b38c6f-dec8-4363-8219-ec92f4ad6057/download278ed8a0c391e96ad6cff19e6874fb17MD551992/48574oai:repositorio.uniandes.edu.co:1992/485742024-03-13 15:14:56.321http://creativecommons.org/licenses/by-nc-sa/4.0/open.accesshttps://repositorio.uniandes.edu.coRepositorio institucional Sénecaadminrepositorio@uniandes.edu.co |