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Related Concept Videos

Measurements of Strain01:27

Measurements of Strain

2.5K
Strain quantifies the deformation of a material under force, typically measured as normal strain, which represents the change in length when compared with the original length. Electrical strain gauges are used for enhanced accuracy. These devices consist of a conductive wire mounted on a paper backing that adheres to the material's surface. These gauges operate on the piezoresistive effect, where the wire's electrical resistance changes in response to mechanical deformation. The strain...
2.5K
True Stress and True Strain01:28

True Stress and True Strain

773
Engineering stress is calculated as the load divided by the original, undeformed cross-sectional area. It approximates a material under load. This approximation is especially relevant post-yield in ductile materials. Though engineering stress-strain diagrams are often used for their convenience and accessibility, they can sometimes fall short in accuracy, particularly when dealing with large strain values.
In contrast, true stress offers a more precise portrayal. It is computed by dividing the...
773
Design Example: Strain Gauge Bridge or Wheatstone Bridge01:15

Design Example: Strain Gauge Bridge or Wheatstone Bridge

937
The utilization of strain gauges as transducers for converting mechanical strain into electrical signals is a common practice in various engineering applications. These strain gauges are frequently integrated into Wheatstone bridge circuits to accurately measure parameters such as force or pressure. Within this context, each element within the circuit exhibits a resistance that undergoes subtle variations when subjected to mechanical strain. The primary objective is to convert minuscule...
937
Three-Dimensional Analysis of Strain01:29

Three-Dimensional Analysis of Strain

575
Three-dimensional strain analysis is crucial for understanding how materials deform under stress, particularly in elastic, homogeneous materials. This method employs principal stress axes to simplify complex stress states into more understandable forms. Subjected to stress, a small cubic element within a material either expands or contracts along these axes, transforming into a rectangular parallelepiped. This transformation effectively illustrates the material's deformation. The principal...
575
Strain Energy01:13

Strain Energy

892
Strain energy is a fundamental concept in the field of materials science and structural engineering, describing the energy absorbed by a material or structure when it is deformed under load.
Consider a rod that is fixed at one end and subjected to an axial force at the free end. This axial force induces stress within the rod, leading to its elongation. As the axial force increases, so does the elongation of the rod, illustrating a direct relationship between the force applied and the resulting...
892
Strain and Elastic Modulus01:15

Strain and Elastic Modulus

8.8K
The quantity that describes the deformation of a body under stress is known as strain. Strain is given as a fractional change in either length, volume, or geometry under tensile, volume (also known as bulk), or shear stress, respectively, and is a dimensionless quantity. The strain experienced by a body under tensile or compressive stress is called tensile or compressive strain, respectively. In contrast, the strain experienced under bulk stress and shear stress is known as volume and shear...
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Related Experiment Video

Updated: Jan 12, 2026

Applying Dynamic Strain on Thin Oxide Films Immobilized on a Pseudoelastic Nickel-Titanium Alloy
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Applying Dynamic Strain on Thin Oxide Films Immobilized on a Pseudoelastic Nickel-Titanium Alloy

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Neat and precise tuning of electronic structures with versatile strain engineering.

Kai Yao1, Fei Pan2, Lixin Song3

  • 1Shanghai Key Laboratory of D&A for Metal-Functional Materials, School of Materials Science & Engineering, Tongji University, Shanghai 201804, China; Research Center of Inorganic Coating Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China.

Science Bulletin
|November 6, 2025
PubMed
Summary

We developed a novel method using tensile strain to enhance microwave absorption in metal oxides. This technique precisely tunes electronic structure, significantly improving material performance for advanced applications.

Keywords:
Broadband absorptionDielectric parametersElectromagnetic wave absorbersImpedance matching

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Last Updated: Jan 12, 2026

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Area of Science:

  • Materials Science
  • Solid State Physics
  • Chemistry

Background:

  • Precise control of electronic structure in transition metal oxides is crucial for functional materials.
  • Conventional chemical synthesis methods often introduce unwanted side effects, hindering precise control and mechanistic understanding.

Purpose of the Study:

  • To introduce a novel strategy for tuning the electronic structure of metal oxides using quenching-induced lattice tensile strain.
  • To investigate the impact of tensile strain on d-p orbital hybridization and its effect on microwave absorption properties.

Main Methods:

  • Inducing lattice tensile strain via a facile quenching method.
  • Analyzing the changes in electronic structure, specifically Mn 3d and O 2p orbital overlap and energy levels.
  • Evaluating microwave absorption performance of strained and unstrained Mn2.05Co0.91O4 and perovskite samples.

Main Results:

  • Tensile strain enhances Mn 3d and O 2p orbital overlap, lowers Mn 3d energy levels, and increases splitting.
  • Strained Mn2.05Co0.91O4 exhibits a 7.52 GHz bandwidth (1.93x improvement) and -67.47 dB minimum reflection loss.
  • The strain strategy proved versatile in perovskites, yielding 1.83x greater bandwidth compared to unstrained samples.

Conclusions:

  • Quenching-induced lattice tensile strain is an effective method for modulating electronic structure and enhancing microwave absorption in oxides.
  • This approach offers a versatile platform for developing advanced functional materials in areas like spintronics, catalysis, and semiconductors.
  • The study establishes a clear link between lattice strain, electronic structure modification, and improved material performance.