Designing a ferrimagnetic-ferroelastic multiferroic semiconductor in FeMoClO 4 nanosheets via element substitution
Source abstract
Abstract
Exploring two-dimensional multiferroic semiconductors, combined with ferro-/ferrimagnetism and ferroelasticity as well as large spin polarization around the valence band maximum (VBM) and conduction band minimum (CBM), is highly desirable but remains a challenging task. Here, via first-principles calculations, we predict such a material based on the square phase FeMoClO4 nanosheet, which is experimentally accessible by exfoliating its layered bulk. Pristine FeMoClO4 nanosheets are a weak antiferromagnet with zero spin polarization. After substituting nonmagnetic Mo with magnetic Mn, the resulting FeMnClO4 nanosheet becomes ferrimagnetic with magnetic ordering temperature significantly enhanced from 14 to 127 K. Besides, the FeMnClO4 nanosheet is a half semiconductor with its VBM and CBM 100% spin-polarized in the same spin direction. Interestingly, the initial square lattice is distorted into a rectangular one, inducing an in-plane ferroelasticity in the FeMnClO4 nanosheet with a switching barrier of 27 meV per atom. Moreover, under ferroelastic transition, the orientation of the magnetic easy axis can be reversibly rotated by 90°, indicating a strong magnetoelastic coupling.
Source: europepmc · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Multiferroics and related materials · 2D Materials and Applications · Ferroelectric and Piezoelectric Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Electronics & Information Engineering, Guangdong Ocean University, Zhanjiang, Guangdong 524088, China
Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
School of Physics, Hefei University of Technology, Hefei, Anhui 230009, China
Interdisciplinary Center for Fundamental and Frontier Sciences, Nanjing University of Science and Technology, Jiangyin, Jiangsu 214443, China
Funding
CAS Key Laboratory of Quantum Information · University of Science and Technology of China · Basic and Applied Basic Research Foundation of Guangdong Province · Tianjin Science and Technology Planning project · China Postdoctoral Science Foundation · National Natural Science Foundation of China · Youth Innovation Promotion Association of the Chinese Academy of Sciences
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