Joule heating in ferromagnetic nanostripes with a notch

Ramos, Eduardo; López López, Cristina; Akerman, Johanna; Muñoz, Manuel y Prieto Martin, Jose Luis (2015). Joule heating in ferromagnetic nanostripes with a notch. "Physical Review B", v. 91 ; pp.. ISSN 1098-0121. https://doi.org/10.1103/PhysRevB.91.214404.

Descripción

Título: Joule heating in ferromagnetic nanostripes with a notch
Autor/es:
  • Ramos, Eduardo
  • López López, Cristina
  • Akerman, Johanna
  • Muñoz, Manuel
  • Prieto Martin, Jose Luis
Tipo de Documento: Artículo
Título de Revista/Publicación: Physical Review B
Fecha: Junio 2015
Volumen: 91
Materias:
Escuela: E.T.S.I. Telecomunicación (UPM)
Departamento: Electrónica Física
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

The temperature in a ferromagnetic nanostripe with a notch subject to Joule heating has been studied in detail. We first performed an experimental real-time calibration of the temperature versus time as a 100 ns current pulse was injected into a Permalloy nanostripe. This calibration was repeated for different pulse amplitudes and stripe dimensions and the set of experimental curves were fitted with a computer simulation using the Fourier thermal conduction equation. The best fit of these experimental curves was obtained by including the temperature-dependent behavior of the electrical resistivity of the Permalloy and of the thermal conductivity of thesubstrate(SiO2). Notably, a nonzero interface thermal resistance between the metallic nanostripe and thesubstrate was also necessary to fit the experimental curves. We found this parameter pivotal to understand ourresults and the results from previous works. The higher current density in the notch, together with the interface thermal resistance, allows a considerable increase of the temperature in the notch, creating a large horizontal thermal gradient. This gradient, together with the high temperature in the notch and the larger current density close to the edges of the notch, can be very influential in experiments studying the current assisted domain wall motion.

Proyectos asociados

TipoCódigoAcrónimoResponsableTítulo
Gobierno de EspañaMAT2011-28532-C03-03Sin especificarSin especificarSin especificar
Gobierno de EspañaMAT2009-08771Sin especificarSin especificarSin especificar

Más información

ID de Registro: 40949
Identificador DC: http://oa.upm.es/40949/
Identificador OAI: oai:oa.upm.es:40949
Identificador DOI: 10.1103/PhysRevB.91.214404
URL Oficial: http://journals.aps.org/prb/abstract/10.1103/PhysRevB.91.214404
Depositado por: Memoria Investigacion
Depositado el: 11 Jun 2016 08:56
Ultima Modificación: 11 Jun 2016 08:56
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