Effective demagnetizing tensors in arrays of magnetic nanopillars
A model describing the effect of magnetic dipolar interactions on the susceptibility of magnetic nanopillars is presented. It is an extension of a recently reported model for three-dimensional randomlike dispersions of nearly spherical nanoparticles in equilibrium [Sánchez <i>et al.</i>,...
| Autores principales: | , , , , , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
2017
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/98500 https://ri.conicet.gov.ar/11336/54340 https://journals.aps.org/prb/abstract/10.1103/PhysRevB.96.174427 |
| Aporte de: |
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I19-R120-10915-98500 |
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| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ciencias Exactas Física Dipolar interactions Effective demagnetizing tensor Arrays of magnetic nanopillars Magnetic susceptibility |
| spellingShingle |
Ciencias Exactas Física Dipolar interactions Effective demagnetizing tensor Arrays of magnetic nanopillars Magnetic susceptibility Mendoza Zélis, Pedro Vega, V. Prida, V. M. Costa Arzuza, L. C. Béron, F. Pirota, K. R. López Ruiz, R. Sánchez, Francisco Homero Effective demagnetizing tensors in arrays of magnetic nanopillars |
| topic_facet |
Ciencias Exactas Física Dipolar interactions Effective demagnetizing tensor Arrays of magnetic nanopillars Magnetic susceptibility |
| description |
A model describing the effect of magnetic dipolar interactions on the susceptibility of magnetic nanopillars is presented. It is an extension of a recently reported model for three-dimensional randomlike dispersions of nearly spherical nanoparticles in equilibrium [Sánchez <i>et al.</i>, Phys. Rev. B 95, 134421 (2017)2469-995010.1103/PhysRevB.95.134421], to well-ordered arrays of nanoparticles out of equilibrium. To test it, a high-quality benchmark consisting of a two-dimensional hexagonal arrangement of quasi-identical parallel nickel nanopillars embedded in a porous alumina template was fabricated. This model is based on an effective demagnetizing tensor, which only depends on a few morphological parameters of the sample, as the nearest-neighbor distance between pillars and the volume fraction of pillars in the specimen. It allows us to obtain the nanopillar intrinsic susceptibility tensor from the magnetic response of the nanopillar ensemble. The values of the in-plane and normal-to-plane susceptibility of the sample are successfully predicted by the model. Furthermore, the model reproduces the susceptibility in the applied field direction, measured for different applied field angles. In this way, it provides a simple and accurate treatment to account for the complex magnetic effects produced by dipolar interactions. |
| format |
Articulo Articulo |
| author |
Mendoza Zélis, Pedro Vega, V. Prida, V. M. Costa Arzuza, L. C. Béron, F. Pirota, K. R. López Ruiz, R. Sánchez, Francisco Homero |
| author_facet |
Mendoza Zélis, Pedro Vega, V. Prida, V. M. Costa Arzuza, L. C. Béron, F. Pirota, K. R. López Ruiz, R. Sánchez, Francisco Homero |
| author_sort |
Mendoza Zélis, Pedro |
| title |
Effective demagnetizing tensors in arrays of magnetic nanopillars |
| title_short |
Effective demagnetizing tensors in arrays of magnetic nanopillars |
| title_full |
Effective demagnetizing tensors in arrays of magnetic nanopillars |
| title_fullStr |
Effective demagnetizing tensors in arrays of magnetic nanopillars |
| title_full_unstemmed |
Effective demagnetizing tensors in arrays of magnetic nanopillars |
| title_sort |
effective demagnetizing tensors in arrays of magnetic nanopillars |
| publishDate |
2017 |
| url |
http://sedici.unlp.edu.ar/handle/10915/98500 https://ri.conicet.gov.ar/11336/54340 https://journals.aps.org/prb/abstract/10.1103/PhysRevB.96.174427 |
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AT mendozazelispedro effectivedemagnetizingtensorsinarraysofmagneticnanopillars AT vegav effectivedemagnetizingtensorsinarraysofmagneticnanopillars AT pridavm effectivedemagnetizingtensorsinarraysofmagneticnanopillars AT costaarzuzalc effectivedemagnetizingtensorsinarraysofmagneticnanopillars AT beronf effectivedemagnetizingtensorsinarraysofmagneticnanopillars AT pirotakr effectivedemagnetizingtensorsinarraysofmagneticnanopillars AT lopezruizr effectivedemagnetizingtensorsinarraysofmagneticnanopillars AT sanchezfranciscohomero effectivedemagnetizingtensorsinarraysofmagneticnanopillars |
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Repositorios |
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1764820493193445377 |