高压制备大线性磁电效应与磁场诱导铁磁-铁电性材料

（Large linear magnetoelectric effect and field-induced ferromagnetism and ferroelectricity in DyCrO4 ）

X. D. Shen, L. Zhou, Y. S. Chai, Y. Wu, Z. H. Liu, Y. Y. Yin, H. B. Cao, C. Dela Cruz, Y. Sun, C. Q. Jin, A. Munoz, J. A. Alonso, Y. W. Long

NPG Asia Materials 11, 50 (2019)

All the magnetoelectric properties of scheelite-type DyCrO4 are characterized by temperature- and field dependent magnetization, specific heat, permittivity, electric polarization, and neutron diffraction measurements. Upon application of a magnetic field within ±3 T, the nonpolar collinear antiferromagnetic structure leads to a large linear magnetoelectric effect with a considerable coupling coefficient. An applied electric field can induce the converse linear magnetoelectric effect, realizing magnetic field control of ferroelectricity and electric field control of magnetism. Furthermore, a higher magnetic field (>3 T) can cause a metamagnetic transition from the initially collinear antiferromagnetic structure to a canted structure, generating a large ferromagnetic magnetization up to 7.0 μB f.u.?1. Moreover, the new spin structure can break the space inversion symmetry, yielding ferroelectric polarization, which leads to coupling of ferromagnetism and ferroelectricity with a large ferromagnetic component.