Related Experiment Video
Updated: Sep 22, 2025
09:06
Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
8.2K
Enhancing Converse Magnetoelectric Coupling Through Strain Engineering in Artificial Multiferroic Heterostructures.
Lauren M Garten1,2, Margo L Staruch1, Konrad Bussmann1
1Material Science and Technology Division, U.S. Naval Research Laboratory, Washington D.C., Washington 20375, United States.
ACS Applied Materials & Interfaces
|May 24, 2022
Summary
Researchers enhanced magnetoelectric coupling in novel heterostructures using multiple strain engineering techniques. This breakthrough achieves the highest non-resonant converse magnetoelectric coefficient at room temperature, paving the way for energy-efficient electronic devices.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Nanotechnology
Background:
- Magnetoelectric materials enable electric field control of magnetism, crucial for advanced electronics.
- Strain-mediated multiferroic heterostructures offer enhanced magnetoelectric coupling over single-phase materials.
- Further improvements are needed for applications like low-power memory, sensors, and antennas.
Purpose of the Study:
- To enhance magnetoelectric coupling in heterostructures by employing multiple strain engineering approaches.
- To investigate the impact of substrate-induced strain and multilayer design on magnetoelectric effects.
- To achieve record-high converse magnetoelectric coefficients at room temperature and low electric fields.
Main Methods:
- Fabrication of Fe0.5Co0.5/Ag multilayer heterostructures on (011) Pb(In1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3 piezoelectric substrates.
- Growth and measurement of heterostructures under controlled strain conditions.
- Characterization of magnetoelectric coupling, magnetic anisotropy, and coercive field dependence.
Main Results:
- Achieved an effective converse magnetoelectric coefficient of ~10-5 s m-1, the highest directly measured non-resonant value to date.
- Demonstrated this effect at room temperature and low electric fields (<2 kV cm-1).
- Observed magnetization reorientation due to strain-modified magnetic anisotropy and domain-mediated switching.
Conclusions:
- Multicomponent strain engineering significantly enhances magnetoelectric coupling in heterostructures.
- The developed approach offers a pathway toward realizing highly energy-efficient magnetoelectric devices.
- This work provides a foundation for next-generation magnetic sensors, memory, and antenna technologies.
Related Concept Videos
01:31Ferromagnetism
2.5K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
2.5K
01:27Biasing of Metal-Semiconductor Junctions
345
Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
345
01:24Metal-Semiconductor Junctions
538
The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The...
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The...
538
01:17Magnetic Damping
580
Eddy currents can produce significant drag on motion, called magnetic damping. For instance, when a metallic pendulum bob swings between the poles of a strong magnet, significant drag acts on the bob as it enters and leaves the field, quickly damping the motion.
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...
580