Displacements of hysteresis loops in magnetite nanoparticles
ABSTRACT: In this work we present a Monte Carlo study to address the effect of surface anisotropy on the exchange bias behavior in magnetite nanoparticles. Our theoretical framework is based on a three-dimensional classical Heisenberg model with nearest magnetic neighbor interactions involving reali...
- Autores:
-
Mazo Zuluaga, Johan
Mejía López, José
Muñoz, Francisco
Restrepo Cárdenas, Johans
- Tipo de recurso:
- Article of investigation
- Fecha de publicación:
- 2012
- Institución:
- Universidad de Antioquia
- Repositorio:
- Repositorio UdeA
- Idioma:
- eng
- OAI Identifier:
- oai:bibliotecadigital.udea.edu.co:10495/30630
- Acceso en línea:
- https://hdl.handle.net/10495/30630
- Palabra clave:
- Nanopartículas de Magnetita
Magnetite Nanoparticles
magnetocrystalline anisotropy
hysteresis loops
- Rights
- openAccess
- License
- http://creativecommons.org/licenses/by-nc-nd/2.5/co/
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| dc.title.spa.fl_str_mv |
Displacements of hysteresis loops in magnetite nanoparticles |
| title |
Displacements of hysteresis loops in magnetite nanoparticles |
| spellingShingle |
Displacements of hysteresis loops in magnetite nanoparticles Nanopartículas de Magnetita Magnetite Nanoparticles magnetocrystalline anisotropy hysteresis loops |
| title_short |
Displacements of hysteresis loops in magnetite nanoparticles |
| title_full |
Displacements of hysteresis loops in magnetite nanoparticles |
| title_fullStr |
Displacements of hysteresis loops in magnetite nanoparticles |
| title_full_unstemmed |
Displacements of hysteresis loops in magnetite nanoparticles |
| title_sort |
Displacements of hysteresis loops in magnetite nanoparticles |
| dc.creator.fl_str_mv |
Mazo Zuluaga, Johan Mejía López, José Muñoz, Francisco Restrepo Cárdenas, Johans |
| dc.contributor.author.none.fl_str_mv |
Mazo Zuluaga, Johan Mejía López, José Muñoz, Francisco Restrepo Cárdenas, Johans |
| dc.subject.decs.none.fl_str_mv |
Nanopartículas de Magnetita Magnetite Nanoparticles |
| topic |
Nanopartículas de Magnetita Magnetite Nanoparticles magnetocrystalline anisotropy hysteresis loops |
| dc.subject.proposal.spa.fl_str_mv |
magnetocrystalline anisotropy hysteresis loops |
| description |
ABSTRACT: In this work we present a Monte Carlo study to address the effect of surface anisotropy on the exchange bias behavior in magnetite nanoparticles. Our theoretical framework is based on a three-dimensional classical Heisenberg model with nearest magnetic neighbor interactions involving realistic crystalline structure for magnetite with tetrahedral and octahedral irons. Cubic magnetocrystalline anisotropy for core spins, single-ion site anisotropy for surface spins, and interaction with a uniform external magnetic field, were considered. Our results revealed the onset of low temperature exchange bias field at high enough values of the surface anisotropy constant (KS). Our results indicate also that the strongly pinned spins at high enough surface anisotropy values are responsible for both the horizontal and vertical shifts of the hysteresis loops |
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2012 |
| dc.date.issued.none.fl_str_mv |
2012 |
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2022-09-13T21:50:22Z |
| dc.date.available.none.fl_str_mv |
2022-09-13T21:50:22Z |
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info:eu-repo/semantics/article |
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http://purl.org/coar/version/c_970fb48d4fbd8a85 |
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http://purl.org/coar/resource_type/c_2df8fbb1 |
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Artículo de investigación |
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http://purl.org/coar/resource_type/c_2df8fbb1 |
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Mazo-Zuluaga, J., & Restrepo, J., & Mejía-López, J., & Muñoz, F. (2012). Displacements of hysteresis loops in magnetite nanoparticles. Revista Mexicana de Física, 58(2),221-224. |
| dc.identifier.issn.none.fl_str_mv |
0035-001X |
| dc.identifier.uri.none.fl_str_mv |
https://hdl.handle.net/10495/30630 |
| dc.identifier.eissn.none.fl_str_mv |
2683-2224 |
| identifier_str_mv |
Mazo-Zuluaga, J., & Restrepo, J., & Mejía-López, J., & Muñoz, F. (2012). Displacements of hysteresis loops in magnetite nanoparticles. Revista Mexicana de Física, 58(2),221-224. 0035-001X 2683-2224 |
| url |
https://hdl.handle.net/10495/30630 |
| dc.language.iso.spa.fl_str_mv |
eng |
| language |
eng |
| dc.relation.ispartofjournalabbrev.spa.fl_str_mv |
Rev. Mex. Fís. |
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info:eu-repo/semantics/openAccess |
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http://creativecommons.org/licenses/by-nc-nd/2.5/co/ |
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https://creativecommons.org/licenses/by-nc-nd/4.0/ |
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openAccess |
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http://creativecommons.org/licenses/by-nc-nd/2.5/co/ http://purl.org/coar/access_right/c_abf2 https://creativecommons.org/licenses/by-nc-nd/4.0/ |
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5 |
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application/pdf |
| dc.publisher.spa.fl_str_mv |
Sociedad Mexicana de Física A.C. |
| dc.publisher.group.spa.fl_str_mv |
Grupo de Estado Sólido Grupo de Magnetismo y Simulación Instrumentación Científica y Microelectrónica |
| dc.publisher.place.spa.fl_str_mv |
Ciudad de México, México |
| institution |
Universidad de Antioquia |
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andres.perez@udea.edu.co |
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Mazo Zuluaga, JohanMejía López, JoséMuñoz, FranciscoRestrepo Cárdenas, Johans2022-09-13T21:50:22Z2022-09-13T21:50:22Z2012Mazo-Zuluaga, J., & Restrepo, J., & Mejía-López, J., & Muñoz, F. (2012). Displacements of hysteresis loops in magnetite nanoparticles. Revista Mexicana de Física, 58(2),221-224.0035-001Xhttps://hdl.handle.net/10495/306302683-2224ABSTRACT: In this work we present a Monte Carlo study to address the effect of surface anisotropy on the exchange bias behavior in magnetite nanoparticles. Our theoretical framework is based on a three-dimensional classical Heisenberg model with nearest magnetic neighbor interactions involving realistic crystalline structure for magnetite with tetrahedral and octahedral irons. Cubic magnetocrystalline anisotropy for core spins, single-ion site anisotropy for surface spins, and interaction with a uniform external magnetic field, were considered. Our results revealed the onset of low temperature exchange bias field at high enough values of the surface anisotropy constant (KS). Our results indicate also that the strongly pinned spins at high enough surface anisotropy values are responsible for both the horizontal and vertical shifts of the hysteresis loopsRESUMEN: En este trabajo presentamos un estudio Monte Carlo para explorar el efecto de la anisotrop´ıa de superficie sobre el comportamiento magnetico ´ y de exchange bias en nanopart´ıculas de magnetita. Nuestro marco teorico se basa en un modelo de Heisenberg cl ´ asico tridimensional con ´ interaccion a primeros vecinos magn ´ eticos y una estructura cristalina realista para la magnetita tomando en cuenta los sitios de hierro ´ tetraedrales y octaedrales. Se considera la anisotrop´ıa cubica magnetocrsitalina para los espines internos, una anisotrop ´ ´ıa superficial para los espines pertenecientes a la superficie, y la interaccion de los espines con un campo magn ´ etico uniforme externo a la muestra por medio ´ de un termino Zeemann. Los resultados revelan la aparici ´ on del campo de exchange bias en el r ´ egimen de baja temperatura para valores ´ suficientemente altos de la constante de anisotrop´ıa de superficie KS. Se hace evidente tambien que los espines de superficie fuertemente ´ anclados, a valores altos de anisotrop´ıa superficial, son responsables de los desplazamientos, tanto horizontales como verticales, de los ciclos de histeresis.COL0008138COL0047009COL00125895application/pdfengSociedad Mexicana de Física A.C.Grupo de Estado SólidoGrupo de Magnetismo y SimulaciónInstrumentación Científica y MicroelectrónicaCiudad de México, Méxicoinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_2df8fbb1https://purl.org/redcol/resource_type/ARTArtículo de investigaciónhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/2.5/co/http://purl.org/coar/access_right/c_abf2https://creativecommons.org/licenses/by-nc-nd/4.0/Displacements of hysteresis loops in magnetite nanoparticlesNanopartículas de MagnetitaMagnetite Nanoparticlesmagnetocrystalline anisotropyhysteresis loopsRev. Mex. Fís.Revista Mexicana de Física221224582ORIGINALMazoJ_2012_DisplacementsOfHysteresisLoops.pdfMazoJ_2012_DisplacementsOfHysteresisLoops.pdfArtículo de investigaciónapplication/pdf2222638https://bibliotecadigital.udea.edu.co/bitstream/10495/30630/1/MazoJ_2012_DisplacementsOfHysteresisLoops.pdfccc8a7fe889fde531d3c5a2981f2649dMD51CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8823https://bibliotecadigital.udea.edu.co/bitstream/10495/30630/2/license_rdfb88b088d9957e670ce3b3fbe2eedbc13MD52LICENSElicense.txtlicense.txttext/plain; charset=utf-81748https://bibliotecadigital.udea.edu.co/bitstream/10495/30630/3/license.txt8a4605be74aa9ea9d79846c1fba20a33MD5310495/30630oai:bibliotecadigital.udea.edu.co:10495/306302022-09-13 16:50:22.99Repositorio Institucional Universidad de Antioquiaandres.perez@udea.edu.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 |