Ferromagnetic order of ultra-thin La0.7Ba0.3MnO3 sandwiched between SrRuO3 layers

Abstract

We demonstrate the stability of ferromagnetic order of one unit cell thick optimally doped manganite (La0.7Ba0.3MnO3, LBMO) epitaxially grown between two layers of SrRuO3 (SRO) by using x-ray magnetic circular dichroism. At low temperature LBMO shows an inverted hysteresis loop due to the strong antiferromagnetic coupling to SRO. Moreover, above SRO TC the manganite still exhibits magnetic remanence. Density Functional Theory calculations show that coherent interfaces of LBMO with SRO hinder electronic confinement and the strong magnetic coupling enables the increase of the LBMO TC. From the structural point of view, interfacing with SRO enables LBMO to have octahedral rotations similar to bulk. All these factors jointly contribute for stable ferromagnetism up to 130 K for a one unit cell LBMO film.

References in corpus (7)

• Critical thickness and orbital ordering in ultrathin La0.7Sr0.3MnO3 films
• Electronic and Spin States of SrRuO3 Thin Films: an X-ray Magnetic Circular Dichroism Study
• Soft x-ray magnetic circular dichroism study of Ca_1-xSr_xRuO_3 across the ferromagnetic quantum phase transition
• Exchange interactions of CaMnO3 in the bulk and at the surface
• Large in-plane deformation of RuO6 octahedron and ferromagnetism of bulk SrRuO3
• Effect of strain on magnetic and orbital ordering of LaSrCrO${}_3$/LaSrMnO${}_3$ heterostructures
• Interface control of electronic transport across the magnetic phase transition in SrRuO_3/SrTiO_3 heterointerface

Cited by in corpus (3)

• Orbital order and ferromagnetism in LaMnO3 doped with Ga
• Sign competing sources of Berry curvature and anomalous Hall conductance humps in topological ferromagnets
• Staggered Dzyaloshinskii-Moriya and canting angle in centrosymmetric altermagnetic and ferromagnetic phases: influence on the anomalous Hall effect and Weyl points