Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Spontaneous exchange bias formation driven by a structural phase transition in the antiferromagnetic material.- ON LINE 2017
Year:2017
Research Areas
  • Physics - Structure of materials,
  • Magnetism
Information
Abstract
Most of the magnetic devices in advanced electronics rely on the exchange bias e?ect, a magnetic interaction that couples a ferromagnetic and an antiferromagnetic material, resulting in a unidirectional displacement of the ferromagnetic hysteresis loop by an amount called the ?exchange bias field?. Setting and optimizing exchange bias involves cooling through the Néel temperature of the antiferromagnetic material in the presence of a magnetic field. Here we demonstrate an alternative process for the generation of exchange bias. In IrMn/FeCo bilayers, a structural phase transition in the IrMn layer develops at room temperature, exchange biasing the FeCo layer as it propagates. Once the process is completed, the IrMn layer contains very large single-crystal grains, with a large density of structural defects within each grain, which are promoted by the FeCo layer. The magnetic characterization indicates that these structural defects in the antiferromagnetic layer are behind the resulting large value of the exchange bias field and its good thermal stability. This mechanism for establishing the exchange bias in such a system can contribute towards the clarification of fundamental aspects of this exchange interaction.
International
Si
JCR
Si
Title
Nature Materials
ISBN
1476-1122
Impact factor JCR
38,891
Impact info
Datos JCR del año 2015
Volume
10.1038/nmat5030
Journal number
From page
28
To page
34
Month
SIN MES
Ranking
Participants
  • Autor: Andrea Migliorini . (UPM)
  • Autor: Balati Kuerbanjiang (University of York)
  • Autor: Teodor Huminiuc (University of York)
  • Autor: Demie Kepaptsoglou (University of York)
  • Autor: Claudio Aroca Hernandez-Ros (UPM)
  • Autor: Manuel Muñoz Sanchez (UPM)
  • Autor: Jose Luis Fernandez Cuñado (IMDEA nanociencia)
  • Autor: Julio Camarero (IMDEA nanociencia)
  • Autor: Gonzalo Vallejo Fernandez (University of York)
  • Autor: Vlado Lazarov (University of York)
  • 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)