1. Antiferromagnetic and dielectric behavior in polycrystalline GdFe0.5Cr0.5O3 thin film
- Author
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Jianhang Shi, Mark E. Johnson, Mingwan Zhang, Menka Jain, and Pu-Xian Gao
- Subjects
010302 applied physics ,Materials science ,Condensed matter physics ,lcsh:Biotechnology ,General Engineering ,02 engineering and technology ,Dielectric ,021001 nanoscience & nanotechnology ,01 natural sciences ,Ferroelectricity ,lcsh:QC1-999 ,Condensed Matter::Materials Science ,Magnetization ,Polarization density ,lcsh:TP248.13-248.65 ,Electric field ,0103 physical sciences ,Antiferromagnetism ,Condensed Matter::Strongly Correlated Electrons ,General Materials Science ,Multiferroics ,0210 nano-technology ,lcsh:Physics ,Spin canting - Abstract
Single phase materials with both spontaneous electric polarization and magnetization are rare, despite remarkable efforts in developing magnetoelectric multiferroics. In this work, a single-phase polycrystalline GdFe0.5Cr0.5O3 (GFCO) thin film was spin-coated onto a platinized silicon substrate. X-ray diffraction data suggest that the film exhibits an orthorhombic perovskite structure with a Pbnm space group. No other impurity phases were detected. Magnetization measurements reveal the Néel temperature of the GFCO film to be ∼220 K and illustrate a weak ferromagnetic component at 5 K, which could be due to spin canting. Frequency dependent ferroelectric–paraelectric transition was observed around 480 K, indicating the diffuse relaxor-like behavior. The electric field dependent polarization measurements show a lossy behavior below 200 K. The electric field dependent dielectric constant (tunability) measured at 1 MHz in a wide temperature range reveals that the tunability maximizes near the observed dielectric maxima, which further confirms the ferroelectric to paraelectric transition in the present film.
- Published
- 2020