2015
DOI: 10.1103/physrevb.92.014426
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Interfacial properties ofLaMnO3/LaNiO3superlattices grown along (001) and (111) orientations

Abstract: We have employed x-ray absorption spectroscopy and x-ray magnetic circular dichroism (XMCD) at the Ni and Mn L 3,2 edges in LaMnO 3 /LaNiO 3 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 compare… Show more

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Cited by 52 publications
(49 citation statements)
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“…The behaviour of the 7-ML-LNO superlattices has been checked in three different samples. The insulating character of the very thin LNO layers, along with the ferromagnetic coupling to LMO at each interface181935, contribute to stabilize the (¼,¼,¼)-magnetic superstructure, otherwise fluctuating in metallic LNO3136. The existence of an interface-induced moment in Ni, coupled parallel to the LMO magnetization, was indeed inferred from X-ray magnetic circular dichroism measurements in several (LNO/LMO) multilayers35, as also found in other published works1819.…”
Section: Resultssupporting
confidence: 72%
“…The behaviour of the 7-ML-LNO superlattices has been checked in three different samples. The insulating character of the very thin LNO layers, along with the ferromagnetic coupling to LMO at each interface181935, contribute to stabilize the (¼,¼,¼)-magnetic superstructure, otherwise fluctuating in metallic LNO3136. The existence of an interface-induced moment in Ni, coupled parallel to the LMO magnetization, was indeed inferred from X-ray magnetic circular dichroism measurements in several (LNO/LMO) multilayers35, as also found in other published works1819.…”
Section: Resultssupporting
confidence: 72%
“…Even though the LNO thickness is the same in both layers, one would expect a modified FS as a consequence of the magnetic coupling and charge transfer at the interfaces. 45 However, the only appreciable effect in our data is a slight widening of the features in the spectra of the heterostructure, possibly due to the finite roughness at the interface with the LMO top layer. When the thickness of the LNO layer is further reduced down to 7 MLs, there is a considerable reduction of spectral weight at the Fermi level consistent with the insulating character of the sample and the band-like features broaden significantly.…”
Section: © 2017 Author(s) All Article Content Except Where Otherwismentioning
confidence: 38%
“…No Fe XMCD was detected within the resolution limit of the measurement in all superlattices, indicating that no or few uncompensated spins exist in the LSFO layers. It should be noted that the (111)-oriented LSMO/LSFO superlattices are distinct from recent reports of FM/nonmagnetic systems where the nonmagnet layer acquires a net magnetic moment at the interface with strong (anti)parallel alignment with the FM moment [44,45]. As will be shown in the following section, this lack of Fe XMCD signal may result from the deviation of the AF spin axis orientation from the bulk structure such that it cants out of the plane of the film.…”
Section: X-ray Magnetic Circular Dichroism Spectroscopymentioning
confidence: 77%