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- Title
Exploring room temperature multiferroicity in Mg<sub>0.3</sub>Co<sub>0.7</sub>Fe<sub>2</sub>O<sub>4</sub> films.
- Authors
Han, Yemei; Shen, Kaisong; Guo, Lili; Hu, Kai; Sun, Zheng; Wu, Haitao; Wang, Fang; Zhang, Kailiang
- Abstract
Multiferroic materials with sizeable magnetization and electric polarization simultaneously at room temperature hold the promise for the realization of low-dissipation multifunctional devices. Here, we demonstrate room temperature multiferroicity in a single-phase Mg0.3Co0.7Fe2O4 spinel ferrite thin films. X-ray diffraction (XRD) patterns along with Raman spectroscopy elucidate spinel structure with Fd 3 ¯ m space group for Mg0.3Co0.7Fe2O4 thin film. The existence of Fe3+, Co2+, and Mg2+ in the Mg0.3Co0.7Fe2O4 films was confirmed by using X-ray photoelectron spectroscopy (XPS). The local magnetic properties were probed by conducting the (magnetic force microscopy) MFM measurements and grain-like magnetic domain structures have been observed. The irreversible behavior of temperature-dependent field cooled (FC) and zero field cooled (ZFC) magnetization curves suggests that the Neel temperature and blocking temperature are higher than 380 K. Mg0.3Co0.7Fe2O4 thin film exhibits typical ferroelectric hysteresis and ferromagnetic hysteresis with saturation polarization of 1.7 µC cm–2 and saturation polarization 148 emu cm–3, which suggest the multiferroicity of the spinel thin film. Piezoresponse response measurements suggest a piezoelectric displacement of 30 Å. The peculiar multiferroicity in the spinel films likely originates from cation ordering and local frustration induced by the inclusion of Mg2+ in the sublattices of the spinel structure. The activation energy of 0.467 eV is calculated which suggests that the polar on hopping could be responsible for the conduction characteristics in the present films. The finding of multiferroicity of Mg0.3Co0.7Fe2O4 thin film may lead to the advancement of multiferroic material for new information storage technology and magnetoelectric sensors.
- Subjects
MAGNETIC force microscopy; POLARIZATION (Electricity); X-ray photoelectron spectroscopy; MAGNETIC domain; PHOTOVOLTAIC effect; MAGNETIC structure
- Publication
Journal of Materials Science: Materials in Electronics, 2023, Vol 34, Issue 33, p1
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-023-11435-1