Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Translating reproducible phase-separated texture in manganites into reproducible two-state low-field magnetoresistance: An imaging and transport study
Year:2008
Research Areas
  • Magnetic materials
Information
Abstract
In thin-film La0.6Ca0.4MnO3, conducting-tip and magnetic force microscopy reveal a pattern of nanoscale phase separation that is reproducible across cooling runs. This pattern represents the intersection of buried three-dimensional filamentary ferromagnetic metallic pathways with the sample surface. As an interlayer in current-perpendicular-to-the-plane trilayer devices, this phase-separated material magnetically decouples ferromagnetic metallic La0.7Ca0.3MnO3 electrodes which switch sharply. This yields sharp two-state low-field magnetoresistance that is also reproducible across cooling runs. The reproducibility and the magnitude of the resistance jump are linked to highly resistive 10−12  m2 constrained domain walls in the pathways of the phase-separated interlayer. Phase separation is normally associated with high-field colossal magnetoresistance and, therefore, its exploitation here to produce low-field effects is unusual.
International
Si
JCR
Si
Title
PHYSICAL REVIEW B
ISBN
1098-0121
Impact factor JCR
3,172
Impact info
Volume
78
10.1103/PhysRevB.78.054409
Journal number
0
From page
054409
To page
054409-5
Month
AGOSTO
Ranking
Participants
  • Participante: et al (U. Cambridge, U.Texas, CNEA Argentina)
  • 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
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)