Related Experiment Video
Updated: Apr 27, 2026
10:36
Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating
Published on: April 12, 2018
10.6K
Reversible electric-field control of magnetization at oxide interfaces
F A Cuellar1, Y H Liu2, J Salafranca3
11] GFMC, Departamento Fisica Aplicada III, Universidad Complutense Madrid, 28040 Madrid, Spain [2].
Nature Communications
|June 24, 2014
Summary
Researchers demonstrate reversible magnetization switching using only voltage, a significant advancement for electric-field control of magnetism. This breakthrough enables magnetic tunnel junctions to toggle between states without an external magnetic field, impacting data storage technology.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Nanotechnology
Background:
- Electric-field control of magnetism is crucial for data storage but typically requires a bias magnetic field for reversible switching.
- Novel electronic phenomena at interfaces of correlated oxides offer potential for new magnetoelectric effects.
Purpose of the Study:
- To demonstrate reversible magnetization switching solely by electric field, eliminating the need for a magnetic field.
- To explore novel magnetoelectric coupling mechanisms at oxide interfaces.
Main Methods:
- Fabrication of a heterostructure sandwiching a non-superconducting cuprate between two manganese oxide layers.
- Investigation of interfacial electronic phenomena, specifically orbital reconstruction and spin interactions.
Main Results:
- Observation of a novel magnetoelectric coupling mechanism driven by orbital reconstruction at the cuprate-manganite interface.
- Demonstration of voltage-controlled ferromagnetic coupling between the manganite layers.
- Successful electrical toggling of magnetic tunnel junctions between distinct magnetization states without a magnetic field.
Conclusions:
- The study presents a method for achieving magnetic field-free, voltage-driven magnetization switching.
- This work highlights the potential of interfacial phenomena in correlated oxides for advanced spintronic devices and data storage applications.
Related Concept Videos
01:31Ferromagnetism
2.8K
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...
2.8K
01:28Magnetostatic Boundary Conditions
1.9K
An electric field suffers a discontinuity at a surface charge. Similarly, a magnetic field is discontinuous at a surface current. The perpendicular component of a magnetic field is continuous across the interface of two magnetic mediums. In contrast, its parallel component, perpendicular to the current, is discontinuous by the amount equal to the product of the vacuum permeability and the surface current. Like the scalar potential in electrostatics, the vector potential is also continuous...
1.9K
01:22MOSFET: Enhancement Mode
1.1K
Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
1.1K
01:25MOS Capacitor
1.8K
A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
1.8K
01:16MOSFET
1.8K
The Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) plays a pivotal role in modern electronics thanks to its versatility and efficiency in controlling electrical currents. This device, also known as IGFET, MISFET, and MOSFET, has three main terminals: the Source, Drain, and Gate. MOSFETs are classified into n-channel or p-channel types based on the doping characteristics of their substrate and the source or drain regions.
In an n-MOSFET, the structure includes n-type source and drain...
In an n-MOSFET, the structure includes n-type source and drain...
1.8K
01:17Characteristics of MOSFET
1.4K
Metal-oxide-semiconductor field-effect Transistors, or MOSFETs, play a critical role in electronic circuits. They are primarily utilized for amplifying and switching signals.
Various vital parameters influence their functionality, which is crucial for theory and electronics applications. First, channel dimensions, precisely length, and width, are pivotal. The size of these channels affects the transistor's ability to carry current and switching speeds; shorter channels typically enable...
Various vital parameters influence their functionality, which is crucial for theory and electronics applications. First, channel dimensions, precisely length, and width, are pivotal. The size of these channels affects the transistor's ability to carry current and switching speeds; shorter channels typically enable...
1.4K