Publication

Interfacial properties of LaMnO3/LaNiO3 superlattices grown along (001) and (111) orientations

Harald Brune, Stefano Rusponi, Jan Gui-Hyon Dreiser
2015
Journal Articles

Abstract

We have employed x-ray absorption spectroscopy and x-ray magnetic circular dichroism (XMCD) at the Ni andMn L-3,L-2 edges in LaMnO3/LaNiO3 superlattices grown along (001) and (111) orientations. Our results show a significant XMCD signal and thus the presence of magnetic moments localized on both Ni and Mn, which are ferromagnetically coupled to each other. X-ray absorption experiments reveal a charge transfer between Ni and Mn which is larger for (111) than for (001) superlattices. These results are compared to theoretical predictions for such superlattices.

Official source

https://infoscience.epfl.ch/entities/publication/893676c9-68b3-4c8a-8ebc-5930f5bce96f

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Harald Brune, Stefano Rusponi, Jan Gui-Hyon Dreiser
2015
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/893676c9-68b3-4c8a-8ebc-5930f5bce96f

About this result

Related concepts (22)

X-ray spectroscopy

X-ray spectroscopy is a general term for several spectroscopic techniques for characterization of materials by using x-ray radiation. When an electron from the inner shell of an atom is excited by the energy of a photon, it moves to a higher energy level. When it returns to the low energy level, the energy which it previously gained by the excitation is emitted as a photon which has a wavelength that is characteristic for the element (there could be several characteristic wavelengths per element).

Magnetic moment

In electromagnetism, the magnetic moment is the magnetic strength and orientation of a magnet or other object that produces a magnetic field. Examples of objects that have magnetic moments include loops of electric current (such as electromagnets), permanent magnets, elementary particles (such as electrons), composite particles (such as protons and neutrons), various molecules, and many astronomical objects (such as many planets, some moons, stars, etc).

Magnetic domain

A magnetic domain is a region within a magnetic material in which the magnetization is in a uniform direction. This means that the individual magnetic moments of the atoms are aligned with one another and they point in the same direction. When cooled below a temperature called the Curie temperature, the magnetization of a piece of ferromagnetic material spontaneously divides into many small regions called magnetic domains. The magnetization within each domain points in a uniform direction, but the magnetization of different domains may point in different directions.

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