Related Experiment Video
Updated: Feb 7, 2026
05:15
Flash Infrared Annealing for Perovskite Solar Cell Processing
Published on: February 3, 2021
8.7K
Spin-induced multiferroicity in the binary perovskite manganite Mn2O3
Junzhuang Cong1, Kun Zhai1, Yisheng Chai1
1Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.
Nature Communications
|August 2, 2018
Summary
Researchers synthesized a unique binary perovskite manganite, Mn2O3, which shows magnetically driven ferroelectricity and a significant magnetoelectric effect at low temperatures. This discovery highlights the potential of binary perovskites for advanced electronic and magnetic materials.
Area of Science:
- Materials Science
- Solid-State Physics
- Crystallography
Background:
- ABO3 perovskite oxides are widely studied for their diverse physical phenomena and applications.
- Typically, perovskite structures require different cations at A and B sites.
- Binary perovskite manganite Mn2O3, with identical A and B site elements, presents a unique structural case.
Purpose of the Study:
- To investigate the physical properties of the binary perovskite manganite Mn2O3.
- To explore the potential of Mn2O3 for novel electronic and magnetic applications.
- To understand the mechanisms behind its observed multiferroicity.
Main Methods:
- Synthesis of Mn2O3 under high-pressure, high-temperature conditions.
- Neutron powder diffraction to analyze magnetic structures.
- Low-temperature measurements to assess ferroelectric and magnetoelectric properties.
Main Results:
- Mn2O3 exhibits magnetically driven ferroelectricity and a pronounced magnetoelectric effect at low temperatures.
- Two complex antiferromagnetic structures were identified below 100 K.
- The multiferroicity arises from a combination of spin, charge, and orbital interactions.
Conclusions:
- The binary perovskite Mn2O3 demonstrates significant multiferroic properties.
- The interplay of electronic and magnetic degrees of freedom is crucial for its behavior.
- Binary perovskite oxides hold promise for developing materials with advanced electric and magnetic functionalities.
Related Concept Videos
01:26Binary Fission
3.2K
Binary fission is the primary mode of asexual reproduction in prokaryotes, such as bacteria. It results in the production of two genetically identical daughter cells. This highly efficient process ensures the rapid propagation of bacterial populations under favorable conditions and involves coordinated cellular and molecular events.DNA Replication and SeparationThe process begins with the replication of the bacterial chromosome. The circular DNA molecule unwinds at a specific origin of...
3.2K
01:20Binary Fission
63.8K
Fission is the division of a single entity into two or more parts, which regenerate into separate entities that resemble the original. Organisms in the Archaea and Bacteria domains reproduce using binary fission, in which a parent cell splits into two parts that can each grow to the size of the original parent cell. This asexual method of reproduction produces cells that are all genetically identical.
63.8K
01:08NMR Spectroscopy: Spin–Spin Coupling
3.2K
The spin state of an NMR-active nucleus can have a slight effect on its immediate electronic environment. This effect propagates through the intervening bonds and affects the electronic environments of NMR-active nuclei up to three bonds away; occasionally, even farther. This phenomenon is called spin–spin coupling or J-coupling. Coupling interactions are mutual and result in small changes in the absorption frequencies of both nuclei involved. While nuclei of the same element are involved...
3.2K
01:17Spin–Spin Coupling: One-Bond Coupling
1.5K
Coupling interactions are strongest between NMR-active nuclei bonded to each other, where spin information can be transmitted directly through the pair of bonding electrons. While nuclei polarize their electrons to the opposite spins, the bonding electron pair has opposite spins. Configurations with antiparallel nuclear spins are expected to be lower in energy. When coupling makes antiparallel states more favorable, J is considered to have a positive value. The one-bond coupling constant, 1J,...
1.5K
01:08Spin–Spin Coupling Constant: Overview
1.5K
In bromoethane, the three methyl protons are coupled to the two methylene protons that are three bonds away. In accordance with the n+1 rule, the signal from the methyl protons is split into three peaks with 1:2:1 relative intensities. The methylene protons appear as a quartet, with the relative intensities of 1:3:3:1.
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must...
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must...
1.5K
01:20Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)
1.7K
Two NMR-active nuclei bonded to a central atom can be involved in geminal or two-bond coupling. Geminal coupling is commonly seen between diastereotopic protons in chiral molecules and unsymmetrical alkenes, among others.
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
1.7K