Strain-Induced Competition between Ferromagnetism and Emergent Antiferromagnetism in (Eu,Sr)MnO3

Published

September 4, 2018

Author(s)

Alexander J Grutter, Steven M. Disseler, E. J. Moon, Dustin Allen Gilbert, E. Arenholz, A. Suter, T. Prokscha, Z. Salman, Brian J Kirby, S. J. May

Abstract

We demonstrate emergent antiferromagnetic interactions is strained thin films of the mixed valence manganite (Eu,SR)MnO₃. Although the composition studied, Eu_0.7Sr_0.3MnO₃, will nominally yield a ferromagnetic phase in bulk, we observe significant suppression of the saturation magnetization in films under both tensile and compressive strain. Despite the magnetization suppression, muon spin rotation spectrometry and polarized neutron reflectometry reveal uniform magnetic ordering in these films. Neutron diffraction and X--ray absorption spectroscopy demonstrate high-temperature G-type antiferromagnetic order in films under tensile strain, in contrast to the A- and C-type orders which are found in the phase diagrams of bulk (Eu,Sr)MnO₃ and other mixed-valence manganites. These probes also show that compressive strain results in a uniform but suppressed magnetization suggestive of canted moment resulting from competition between ferromagnetism and antiferromagnetism.

Citation

Physical Review Materials

Volume

2

Issue

2

Pub Type

Journals

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Keywords

Magnetism, Complex Oxide, Perovskite, Strain, Thin Film, Antiferromagnetism, Neutron Scattering, Manganite

Citation

, A. , , S. , , E. , , D. , Arenholz, E. , Suter, A. , Prokscha, T. , Salman, Z. , , B. and , S. (2018), Strain-Induced Competition between Ferromagnetism and Emergent Antiferromagnetism in (Eu,Sr)MnO₃, Physical Review Materials, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=925729 (Accessed December 8, 2024)