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Ferromagnetism in ultrathin surface-free La0.7Sr0.3MnO3 layers in electrostatically defined heterostructures

DOI: 10.1103/PhysRevMaterials.5.084409 DOI Help

Authors: A. Galdi (Cornell University; Università degli Studi di Salerno) , N. Coppola (Università degli Studi di Salerno) , C. Sacco (Università degli Studi di Salerno) , L. Maritato (Università degli Studi di Salerno) , P. Bencok (Diamond Light Source) , P. Steadman (Diamond Light Source) , P. Orgiani (CNR-IOM; CNR-SPIN, UOS Salerno) , C. Aruta (CNR-SPIN, UOS Roma)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review Materials , VOL 5

State: Published (Approved)
Published: August 2021
Diamond Proposal Number(s): 14915

Abstract: Electrostatically defined perovskite oxide heterostructures, in which carriers are confined by the modulation of the A-site ion charge, offer new possibilities of tuning the magnetic properties of manganite oxides. We investigate the preferential orientation of ferromagnetic and antiferromagnetic moments in ultrathin La 0.7 Sr 0.3 MnO 3 layers embedded in antiferromagnetic Sr MnO 3 as they undergo a metal-to-insulator transition with decreasing thickness. Our results evince the role of orbital occupation, metallicity, and competition of different magnetic phases, in absence of spurious effects occurring in thin films as a result of symmetry breaking at La 0.7 Sr 0.3 MnO 3 interfaces and of incorporation of oxygen vacancies.

Journal Keywords: Antiferromagnetism; Ferromagnetism; Magnetic anisotropy; Metal-insulator transition; Multilayer thin films; Transition-metal oxides; Ultrathin films; X-ray magnetic circular dichroism; X-ray magnetic linear dichroism

Diamond Keywords: Antiferromagnetism; Ferromagnetism

Subject Areas: Materials, Physics

Instruments: I10-Beamline for Advanced Dichroism

Added On: 30/08/2021 08:38

Discipline Tags:

Materials Science Metallurgy Perovskites Quantum Materials Physics Electronics Hard condensed matter - electronic properties Magnetism Surfaces interfaces and thin films

Technical Tags:

Spectroscopy Circular Dichroism (CD) Linear Dichroism (LD) X-ray Magnetic Circular Dichroism (XMCD) X-ray Magnetic Linear Dichroism (XMLD)