Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Influence of the thermal contact resistance in current-induced domain wall depinning
Year:2017
Research Areas
  • Physics chemical and mathematical,
  • Nano scale technologies
Information
Abstract
In this work we study the influence of the thermal contact resistance on the temperature of a typical nanostripe used in current induced magnetic domain wall movement or depinning. The thermal contact resistance arises from an imperfect heat transport across the interface between the metallic ferromagnetic nanostripe and the substrate. We show that this parameter, which is likely non-zero in any experimental device, increases the temperature in the nanostripe considerably. When the current is injected in the nanostripe in nanosecond long pulses, the larger temperature also implies a reduction of the effective current density delivered by the pulse generator. Both the thermal contact resistance and the dynamic response of the pulse generator are usually neglected in theoretical estimations of the influence of spin transfer torque on domain wall displacement and depinning. Here we show that only if the thermal contact resistance and the electric resistivity of the ferromagnetic nanostripe are optimized to the best values reported in the bibliography, the Joule heating may not be so crucial for current densities of the order of 10 E+8 A/cm^2 . Also, the use of physical constrictions (notch) to pin the magnetic domain wall may complicate the interpretation of the results as they always come together with relevant thermal gradients.
International
Si
JCR
Si
Title
Journal of Physics D-Applied Physics
ISBN
0022-3727
Impact factor JCR
2,772
Impact info
Datos JCR del año 2015
Volume
50
10.1088/1361-6463/aa7a9c
Journal number
32
From page
32501
To page
32501 (8pp
Month
SIN MES
Ranking
Participants
  • Autor: Cristina Lopez Lopez (UPM)
  • Autor: Eduardo Ramos (Instituto de Sistemas Optoelelctrónicos, Universidad Politécnica de Madrid)
  • Autor: Manuel Muñoz Sanchez (UPM)
  • Autor: Sohini Kar-Narayan (University of Cambridge)
  • Autor: Neil Mathur (University of Cambridge)
  • Autor: Jose Luis Prieto Martin (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Grupo de dispositivos magnéticos del ISOM
  • Centro o Instituto I+D+i: Instituto Universitario de Sistemas Optoelectrónicos y Microtecnología
  • Departamento: Electrónica Física, Ingeniería Eléctrica y Física Aplicada
S2i 2019 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)