Nanoscale Suppression of Magnetization at Atomically Assembled Manganite Interfaces

Abstract

Using polarized X-rays, we compare the electronic and magnetic properties of a La(2/3)Sr(1/3)MnO(3)(LSMO)/SrTiO(3)(STO) and a modified LSMO/LaMnO(3)(LMO)/STO interface. Using the technique of X-ray resonant magnetic scattering (XRMS), we can probe the interfaces of complicated layered structures and quantitatively model depth-dependent magnetic profiles as a function of distance from the interface. Comparisons of the average electronic and magnetic properties at the interface are made independently using X-ray absorption spectroscopy (XAS) and X-ray magnetic circular dichroism (XMCD). The XAS and the XMCD demonstrate that the electronic and magnetic structure of the LMO layer at the modified interface is qualitatively equivalent to the underlying LSMO film. From the temperature dependence of the XMCD, it is found that the near surface magnetization for both interfaces falls off faster than the bulk. For all temperatures in the range of 50K - 300K, the magnetic profiles for both systems always show a ferromagnetic component at the interface with a significantly suppressed magnetization that evolves to the bulk value over a length scale of ~1.6 - 2.4 nm. The LSMO/LMO/STO interface shows a larger ferromagnetic (FM) moment than the LSMO/STO interface, however the difference is only substantial at low temperature.

4 pages, 4 figures

References in corpus (4)

• Nearly total spin polarization in La2/3Sr1/3MnO3 from tunneling experiments
• The origin of high transport spin polarization in La${}_{0.7}$Sr${}_{0.3}$MnO${}_3$: direct evidence for minority spin states
• Electronic Phase Separation in Manganite/Insulator Interfaces
• Electronic and magnetic properties of the (001) surface of hole-doped manganites

Cited by in corpus (18)

• Interface ferromagnetism and orbital reconstruction in BiFeO3- La0.7Sr0.3MnO3 heterostructures
• Emergent properties hidden in plane view: Strong electronic correlations at oxide interfaces
• Optimized fabrication of high quality La0.67Sr0.33MnO3 thin films considering all essential characteristics
• Strain-driven elastic and orbital-ordering effects on thickness-dependent properties of manganite thin films
• Preventing the reconstruction of the polar discontinuity at oxide heterointerfaces
• Determining the Curie temperature of La0.67Sr0.33MnO3 thin films
• Mott Electrons in an Artificial Graphenelike Crystal of Rare-Earth Nickelate
• Electron sampling depth and saturation effects in perovskite films investigated by soft x-ray absorption spectroscopy
• Enhancing interfacial magnetization with a ferroelectric
• Interface Ferromagnetism in (110)-Oriented La0.7Sr0.3MnO3/SrTiO3 Ultrathin Superlattices
• Improved tunneling magnetoresistance at low temperature in manganite junctions grown by molecular beam epitaxy
• Appearance and disappearance of ferromagnetism in ultra-thin LaMnO${}_3$ on SrTiO${}_3$ substrate: a viewpoint from first-principles
• Measuring magnetic profiles at manganite surfaces with monolayer resolution
• Interfacial Magnetism in Complex Oxide Heterostructures Probed by Neutrons and X-rays
• Effects of Strain and Buffer Layer on Interfacial Magnetization in Sr${}_2$CrReO${}_6$ Films Determined by Polarized Neutron Reflectometry
• Composition dependence of electronic, magnetic, transport and morphological properties of mixed valence manganite thin films
• Superconductivity-driven magnetization modulation in YBa2Cu3O7-δ /SrTiO3/La0.67Sr0.33MnO3 heterostructures
• Interface combinatorial pulsed laser deposition to enhance heterostructures functional properties