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Interfacial Symmetry Control of Emergent Ferromagnetism at the Nanoscale



Alexander J. Grutter, A. Vailionis, Julie A. Borchers, Brian J. Kirby, C. L. Flint, C. He, E. Arenholz, Y. Suzuki


We demonstrate tunable switching between ferromagnetic and antiferromagnetic order at the CaRuO3/CaMnO3 interface that originates from symmetry differences in the tilt and rotation of the oxygen octahedra across the boundary. Interfaces which are symmetry-matched across the boundary exhibit interfacial CaMnO3 ferromagnetism while the ferromagnetism at symmetry-mismatched interfaces is suppressed. Thus, interfacial symmetry differences inhibit the formation of emergent of antiferromagnetic order, and we find CaMnO3 antiferromagnetic correlation lengths which far exceed the thickness of an individual CaMnO3 layer, extending through several nominal paramagnetic spacers.
Nano Letters


Magnetism, Oxide, Perovskite, Film, Symmetry, Interface


Grutter, A. , Vailionis, A. , Borchers, J. , Kirby, B. , , C. , He, C. , Arenholz, E. and Suzuki, Y. (2016), Interfacial Symmetry Control of Emergent Ferromagnetism at the Nanoscale, Nano Letters, [online], (Accessed June 21, 2024)


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Created September 14, 2016, Updated February 19, 2017