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Ferroelectric Control of Magnetism in Ultrathin HfO2\Co\Pt Layers.
Vermeulen, Bart F; Ciubotaru, Florin; Popovici, Mihaela I; Swerts, Johan; Couet, Sébastien; Radu, Iuliana P; Stancu, Alexandru; Temst, Kristiaan; Groeseneken, Guido; Adelmann, Christoph; Martens, Koen M.
Afiliação
  • Vermeulen BF; Laboratorium voor Halfgeleiderfysica , KU Leuven , 3001 Leuven , Belgium.
  • Ciubotaru F; IMEC , Kapeldreef 75 , 3001 Leuven , Belgium.
  • Popovici MI; IMEC , Kapeldreef 75 , 3001 Leuven , Belgium.
  • Swerts J; IMEC , Kapeldreef 75 , 3001 Leuven , Belgium.
  • Couet S; IMEC , Kapeldreef 75 , 3001 Leuven , Belgium.
  • Radu IP; IMEC , Kapeldreef 75 , 3001 Leuven , Belgium.
  • Stancu A; IMEC , Kapeldreef 75 , 3001 Leuven , Belgium.
  • Temst K; Faculty of Physics , Alexandru Ioan Cuza University of Iasi , Iasi 700506 , Romania.
  • Groeseneken G; Instituut voor Kern-en Stralingsfysica , KU Leuven , 3001 Leuven , Belgium.
  • Adelmann C; IMEC , Kapeldreef 75 , 3001 Leuven , Belgium.
  • Martens KM; Department of Electrical Engineering , KU Leuven , 3001 Leuven , Belgium.
ACS Appl Mater Interfaces ; 11(37): 34385-34393, 2019 Sep 18.
Article em En | MEDLINE | ID: mdl-31449744
ABSTRACT
The recent demonstration of ferroelectricity in ultrathin HfO2 has kickstarted a new wave of research into this material. HfO2 in the orthorhombic phase can be considered the first and only truly nanoscale ferroelectric material that is compatible with silicon-based nanoelectronics applications. In this article, we demonstrate the ferroelectric control of the magnetic properties of cobalt deposited on ultrathin aluminum-doped, atomic layer deposition-grown HfO2 (tHfO2 = 6.5 nm). The ferroelectric effect is shown to control the shape of the magnetic hysteresis, quantified here by the magnetic switching energy. Furthermore, the magnetic properties such as the remanence are modulated by up to 41%. We show that this modulation does not only correlate with the charge accumulation at the interface but also shows an additional component associated with the ferroelectric polarization switching. An in-depth analysis using first order reversal curves shows that the coercive and interaction field distributions of cobalt can be modulated up to, respectively, 5.8% and 10.5% with the ferroelectric polarization reversal.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2019 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2019 Tipo de documento: Article