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Engineering of Ferroic Orders in Thin Films by Anionic Substitution

Journal Article · · Advanced Functional Materials

Multiferroics are a unique class of materials where magnetic and ferroelectric orders coexist. The research on multiferroics contributes significantly to the fundamental understanding of the strong correlations between different material degrees of freedom and provides an energy-efficient route toward the electrical control of magnetism. While multiple ABO3 oxide perovskites are identified as being multiferroic, their magnetoelectric coupling strength is often weak, necessitating the material search in different compounds. Here, the observation of room-temperature multiferroic orders in multi-anion SrNbO3-xNx thin films is reported. In these samples, the multi-anion state enables the room-temperature ferromagnetic ordering of the Nb d-electrons. Simultaneously, ferroelectric responses that originate from the structural symmetry breaking associated are found with both the off-center displacements of Nb and the geometric displacements of Sr, depending on the relative O-N arrangements within the Nb-centered octahedra. So findings not only diversify the available multiferroic material pool but also demonstrate a new multiferroism design strategy via multi-anion engineering.

Research Organization:
West Virginia University, Morgantown, WV (United States)
Sponsoring Organization:
USDOE Office of Science (SC); National Science Foundation (NSF); Texas Advances Computer Center; National Fund for Scientific Research (FNRS); Universidad Industrial de Santander
Grant/Contract Number:
SC0016176; SC0019491
OSTI ID:
1976170
Journal Information:
Advanced Functional Materials, Journal Name: Advanced Functional Materials Journal Issue: 2 Vol. 32; ISSN 1616-301X
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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