Strain-induced magnetization control in an oxide multiferroic heterostructure

Abstract

Controlling magnetism by using electric fields is a goal of research towards novel spintronic devices and future nano-electronics. For this reason, multiferroic heterostructures attract much interest. Here we provide experimental evidence, and supporting DFT analysis, of a transition in La0.65Sr0.35MnO3 (LSMO) thin film to a stable ferromagnetic phase, that is induced by the structural and strain properties of the ferroelectric BaTiO3 (BTO) substrate, which can be modified by applying external electric fields. X-ray Magnetic Circular Dichroism (XMCD) measurements on Mn L edges with a synchrotron radiation show, in fact two magnetic transitions as a function of temperature that correspond to structural changes of the BTO substrate. We also show that ferromagnetism, absent in the pristine condition at room temperature, can be established by electrically switching the BTO ferroelectric domains in the out-of-plane direction. The present results confirm that electrically induced strain can be exploited to control magnetism in multiferroic oxide heterostructures.

References in corpus (10)

• Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
• Colossal Magnetoresistant Materials: The Key Role of Phase Separation
• Giant sharp magnetoelectric switching in multiferroic epitaxial La_{0.67}Sr_{0.33}MnO_3 on BaTiO_3
• Influence of strain on magnetization and magnetoelectric effect in La0.7A0.3MnO3 / PMN-PT(001) (A = Sr; Ca)
• Structural, magnetic and electrical properties of single crystalline La_(1-x)Sr_xMnO_3 for 0.4 < x < 0.85
• High temperature magnetic insulating phase in ultrathin La0.67Sr0.33MnO3 films
• Thickness-dependent ferromagnetic metal to paramagnetic insulator transition in La${}_{0.6}$Sr${}_{0.4}$MnO${}_3$ thin films studied by x-ray magnetic circular dichroism
• Temperature control of local magnetic anisotropy in multiferroic CoFe/BaTiO3
• Surface Magnetic Phase Diagram of Tetragonal Manganites
• Surface antiferromagnetism and incipient metal-insulator transition in strained manganite films

Cited by in corpus (4)

• All-optical helicity-independent switching state diagram in GdFeCo alloys
• Proximity-induced ferromagnetism and chemical reactivity in few layers VSe2 heterostructures
• Tailoring ferromagnetism through electrically controlled morphology
• Strain and electric field control of magnetic and electrical transport properties in a magneto-elastically coupled Fe3O4/BaTiO3(001) heterostructure