Emergent Ferromagnetism in CaRuO 3 /CaMnO 3 (111)-Oriented Superlattices.

Autor: Kane M; Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States.; Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California 94305, United States., Bhandari C; Ames National Laboratory, Iowa State University, Ames, Iowa 50011, United States., Holtz ME; Metallurgical and Materials Engineering, Colorado School of Mines, Golden, Colorado 80401, United States., Balakrishnan PP; NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States., Grutter AJ; NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States., Fitzsimmons M; Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830 United States., Yang CY; Department of Material Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu City 30100, Taiwan., Satpathy S; Department of Physics & Astronomy, University of Missouri, Columbia, Missouri 65211, United States., Paudyal D; Ames National Laboratory, Iowa State University, Ames, Iowa 50011, United States.; Department of Electrical and Computer Engineering, Iowa State University, Ames, Iowa 50011, United States., Suzuki Y; Department of Applied Physics, Stanford University, Stanford, California 94305, United States.; Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California 94305, United States.
Jazyk: angličtina
Zdroj: Nano letters [Nano Lett] 2024 Feb 28; Vol. 24 (8), pp. 2567-2573. Date of Electronic Publication: 2024 Feb 17.
DOI: 10.1021/acs.nanolett.3c04623
Abstrakt: The boundary between CaRuO 3 and CaMnO 3 is an ideal test bed for emergent magnetic ground states stabilized through interfacial electron interactions. In this system, nominally antiferromagnetic and paramagnetic materials combine to yield interfacial ferromagnetism in CaMnO 3 due to electron leakage across the interface. In this work, we show that the crystal symmetry at the surface is a critical factor determining the nature of the interfacial interactions. Specifically, by growing CaRuO 3 /CaMnO 3 heterostructures along the (111) instead of the (001) crystallographic axis, we achieve a 3-fold enhancement of the magnetization and involve the CaRuO 3 layers in the ferromagnetism, which now spans both constituent materials. The stabilization of a net magnetic moment in CaRuO 3 through strain effects has been long-sought but never consistently achieved, and our observations demonstrate the importance of interface engineering in the development of new functional heterostructures.
Databáze: MEDLINE