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MA: Fachverband Magnetismus
MA 30: Functional Antiferromagnetism
MA 30.12: Vortrag
Mittwoch, 11. März 2026, 12:30–12:45, POT/0151
Strain engineering of antiferromagnetic LaFeO3 films for magneto-optical investigations — •Antonia Rieche, Wolfgang Hoppe, Chis Körner, Aurora Diana Rata, Andreas Herklotz, and Kathrin Dörr — Martin-Luther-Universität Halle-Wittenberg
LaFeO3 is a representative member of the orthoferrites. This antiferromagnet exhibits a high Néel temperature of 740 K. A weak net magnetization is created due to a small tilting of the magnetic moments. LaFeO3 is considered to be a promising candidate for antiferromagnetic spintronics.
While the magneto-optical Kerr effect (MOKE) has been used to investigate bulk crystals, only a single study has reported MOKE data for LaFeO3. [1]
Our work demonstrates the magnetic switching behavior of coherently strained LaFeO3 films. The strain states were generated using different substrates and helium implantation. [2] The films were grown using pulsed laser deposition (KrF 248 nm), and their strain state was analyzed by X-ray diffraction.
Longitudinal MOKE hysteresis and microscopy measurements revealed a strain-dependent orientation of the magnetization axis, which is consistent with predictions from density functional theory. [3] Further single-domain remanence has been confirmed.
[1] J. Alaria et al., Chem. Sci. 5, 1599 (2014)
[2] A. Herklotz et al., Adv. Science, 5, 1800356 (2018)
[3] A. J. Mao et al., RSC Adv. 6, 100526 (2016)
Keywords: Orthoferrites; Antiferromagnetism; Thin films; Epitaxial strain; Magneto-optical Kerr-effect