Tuning the interlayer coupling in La0.7Sr0.3Mn0.95Ru0.05 O3/LaNiO3 multilayers with perpendicular magnetic anisotropy

Jörg Schöpf*, Valentina Piva, Paul H.M. Van Loosdrecht, Ionela Lindfors-Vrejoiu*, Padraic Shafer, Divine P. Kumah, Xuanyi Zhang, Lide Yao, Sebastiaan Van Dijken

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

33 Lataukset (Pure)

Abstrakti

In ferromagnetic oxide epitaxial multilayers, magnetic properties and interlayer coupling are determined by a variety of factors. Beyond the contribution of interlayer exchange coupling, strain and interfacial effects, such as structural reconstructions or charge transfer, play significant roles, resulting in complex magnetic behavior. In this study, the interlayer coupling of ferromagnetic La0.7Sr0.3Mn0.95Ru0.05O3 (LSMRO) layers (8 nm thick) was investigated, when separated by epitaxial spacers of paramagnetic metallic LaNiO3 (LNO), in stacks exhibiting perpendicular magnetic anisotropy. By varying the thickness of the spacer, it was found that the coupling between two LSMRO layers changes from antiferromagnetic (with a 4-unit-cell-thick LNO spacer) to ferromagnetic (with a 6-unit-cell-thick LNO spacer). For multilayers comprising five LSMRO layers and a 4-unit-cell-thick LNO spacer, the antiferromagnetic coupling was preserved. However, the effective magnetic anisotropy changed, causing the magnetization to cant more towards the in-plane direction. This behavior was corroborated by X-ray magnetic circular dichroism (XMCD) investigations at the Mn and Ni L3 edges. The XMCD results indicated that the 4-unit-cell-thick LNO spacer in the multilayer become magnetically ordered, closely following the magnetization of adjacent LSMRO layers.

AlkuperäiskieliEnglanti
Artikkeli094410
Sivut1-7
Sivumäärä7
JulkaisuPhysical Review Materials
Vuosikerta8
Numero9
DOI - pysyväislinkit
TilaJulkaistu - syysk. 2024
OKM-julkaisutyyppiA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

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