Ferromagnetism at Room Temperature Induced by Spin Structure Change in BiFe<sub>1-</sub><sub>x</sub> Co<sub>x</sub> O<sub>3</sub> Thin Films.

Hojo, Hajime; Kawabe, Ryo; Shimizu, Keisuke; Yamamoto, Hajime; Mibu, Ko; Samanta, Kartik; Saha-Dasgupta, Tanusri; Azuma, Masaki · Adv Mater · 2017

basic_science · Level V

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Abstract

The coexistence and coupling of ferromagnetic and ferroelectric orders in a single material is crucial for realizing next-generation multifunctional applications. The coexistence of such orders is confirmed at room temperature in epitaxial thin films of BiFe<sub>1-</sub><sub>x</sub> Co<sub>x</sub> O<sub>3</sub> (x ≤ 0.15), which manifests a spin structure change from a low-temperature cycloidal one to a high-temperature collinear one with canted ferromagnetism.