Vector analysis of electric-field-induced antiparallel magnetic domain evolution in ferromagnetic/ferroelectric heterostructures

Abstract

Electric field (E-field) control of magnetism based on magnetoelectric coupling is one of the promising approaches for manipulating the magnetization with low power consumption. The evolution of magnetic domains under in-situ E-fields is significant for the practical applications in integrated micro/nano devices. Here, we report the vector analysis of the E-field-driven antiparallel magnetic domain evolution in FeCoSiB/PMN-PT(011) multiferroic heterostructures via in-situ quantitative magneto-optical Kerr microscope. It is demonstrated that the magnetic domains can be switched to both the 0° and 180° easy directions at the same time by E-fields, resulting in antiparallel magnetization distribution in ferromagnetic/ferroelectric heterostructures. This antiparallel magnetic domain evolution is attributed to energy minimization with the uniaxial strains by E-fields which can induce the rotation of domains no more than 90°. Moreover, domains can be driven along only one or both easy axis directions by reasonably selecting the initial magnetic domain distribution. The vector analysis of magnetic domain evolution can provide visual insights into the strain-mediated magnetoelectric effect, and promote the fundamental understanding of electrical regulation of magnetism.

Orientation-tunable ferroelectric and energy storage properties in PMN–PT single crystals

“…The multidomain structures, and the ferroelectric rhombohedral and tetragonal phases coexisting in the 0.7PMN-0.3PT single crystals, lead to many interesting physical phenomena (e.g., field-induced phase transition) and excellent electrical properties, such as excellent piezoelectric properties (d 33 > 2400 pC N −1 ), and thus, the PMN-PT crystals have been widely used as substrates to grow functional thin films. [26][27][28][29] In addition, the relaxor characteristics of the PMN-PT would be weakened with an increase in PT content when the PT content is less than 0.3, which enables a more stable domain structure for 0.7PMN-0.3PT. Therefore, a comprehensive study of 0.7PMN-0.3PT single crystals is significant for the deep understanding of the relationship between the micro-domain structures and macro-physical properties and the expansion of application fields.…”

The Modulated Magnetic Domain Structure in the La0.67Sr0.33MnO3 Ferromagnetic Films by Strain Engineering

“…[1][2][3][4][5] Especially, La 0.67 Sr 0.33 MnO 3 (LSMO) has been one of the most extensively studied ferromagnetic materials because of its considerably high Curie temperature (%360 K) and the abundance of magnetic domain types. [6][7][8][9][10] The achievement of the microscopic magnetic structure has promoted the fundamental understanding of spin-polarized currenttransport properties as well as the design strategy of high-performance magnetic materials, which is determined by the crystalline structure and magnetic interaction. Magnetic anisotropy (MA) is one of the key roles in modifying and using the magnetic domain structure, which is mainly determined by the strain state in the ferromagnetic oxide films.…”

The Spin Modulation Stimulated Efficient Electrocatalytic Oxygen Evolution Reaction over LaCoO3 Perovskite

“…This is because that the electronic configuration transition would optimize the e g orbital occupation of transition-metal ions. [24][25][26][27][28][29][30][31][32][33] Based on the above consideration, herein, we proposed a spin state modulation strategy to improve the electrocatalytic activity of LaCoO 3 (LCO). Firstly, the LCO catalyst was fabricated by a simple solgel method, and then high temperature thermal reduction treatment was adopted to regulate the electronic configuration.…”

“…Based on previous reports, effective regulation of the electronic configuration of LaCoO 3 may provide an effective method to improve its catalytic behavior. This is because that the electronic configuration transition would optimize the e g orbital occupation of transition‐metal ions [24–33] . Based on the above consideration, herein, we proposed a spin state modulation strategy to improve the electrocatalytic activity of LaCoO 3 (LCO).…”