Single-layer orthogonal-structure magnetoelectric multiferroic ceramic and preparation method thereof

Abstract

The invention discloses single-layer orthogonal-structure magnetoelectric multiferroic ceramic and a preparation method thereof. The lattice parameters of the ceramic are as follows: the chemical formula is LaFe<0.5>Co<0.5>O3 (LCFO), and the molecular weight is 244.29; the crystal system is an orthorhombic crystal system; the space group is pbnm; a is 5.521(9) angstroms; b is 5.530(0) angstroms; cis 7.812(7) angstroms; alpha=beta=gamma=90o; the volume is 238.5(69). The preparation method comprises the following steps: preparing precursor powder of the LaFe<0.5>Co<0.5>O3 (LCFO), and preparingthe ceramic from the precursor powder. According to the method, the preparation temperature of the single-layer multiferroic ceramic is greatly reduced, the magnetic performance of the obtained ceramic sample is remarkably improved, the density is high, the microcosmic particle size is uniform, the technological process is simple and stable, the sintering temperature is low, the reaction period isshort, raw materials are non-toxic, and environmental coordination is better achieved.

Description

technical field [0001] The invention relates to a lanthanum iron cobaltate ceramic with a single-layer perovskite structure and an orthogonal structure with ferroelectric and ferromagnetic properties and a preparation method thereof, belonging to the preparation of oxide ceramic materials. Background technique [0002] A single-phase multiferroic material is a material that exhibits at least two types of ferroelectricity, ferromagnetism, or ferroelasticity in the same phase. The multiferroic properties of this type of material show great application prospects in multifunctional electronic devices, new information storage, and magnetoelectric control sensors. There are no multiferroic materials in nature and rely on artificial synthesis. However, most single-phase multiferroic materials cannot have both ferromagnetism and ferroelectricity at room temperature due to the different competing requirements of electrons, which limits their application range. Ferrous materials have...

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Problems solved by technology

The LaFe prepared in the currently known literature 0.5 co 0.5 o 3 The ceramic samples all exhibit antiferromagnetism with a cubic structure, and exhibit strong ferromagnetic properties after the lattice distortion becomes an orthorhombic structure, and ceramic samples whose space group belongs to Pbnm have not been reported.

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