Related Experiment Video
Updated: Mar 19, 2026
12:20
Sputter Growth and Characterization of Metamagnetic B2-ordered FeRh Epilayers
Published on: October 5, 2013
15.1K
Implementing Room-Temperature Multiferroism by Exploiting Hexagonal-Orthorhombic Morphotropic Phase Coexistence in
Seungwoo Song1, Hyeon Han1, Hyun Myung Jang2
1Department of Materials Science and Engineering, and Division of Advanced Materials Science, Pohang University of Science and Technology (POSTECH), Pohang, 790-784, Republic of Korea.
Advanced Materials (Deerfield Beach, Fla.)
|June 17, 2016
Summary
Researchers demonstrate room-temperature multiferroism in LuFeO3 films by combining orthorhombic and hexagonal phases. This novel approach reveals magnetoelectric coupling, offering new possibilities for advanced materials.
Area of Science:
- Materials Science
- Solid State Physics
- Condensed Matter Physics
Background:
- Multiferroic materials exhibit multiple ferroic orders, such as ferroelectricity and ferromagnetism.
- Single-phase LuFeO3 (LFO) films typically show either orthorhombic or hexagonal structures, limiting their multiferroic properties.
- Achieving room-temperature multiferroism is a key goal for technological applications.
Purpose of the Study:
- To demonstrate room-temperature multiferroism in LuFeO3 films.
- To investigate the role of phase coexistence in achieving multiferroic properties.
- To explore magnetoelectric coupling in multiferroic LuFeO3 films.
Main Methods:
- Fabrication of LuFeO3 films exhibiting coexisting orthorhombic and hexagonal phases.
- Characterization of structural, ferroelectric, and magnetic properties.
- Analysis of magnetoelectric coupling effects.
Main Results:
- Successful demonstration of room-temperature multiferroism in LuFeO3 films.
- Observation of significant magnetoelectric coupling, absent in single-phase films.
- Attribution of multiferroism to the synergistic effects of orthorhombic and hexagonal phases.
Conclusions:
- The coexistence of orthorhombic and hexagonal phases in LuFeO3 films is crucial for achieving room-temperature multiferroism.
- This approach enables novel magnetoelectric coupling phenomena.
- LuFeO3 films with phase coexistence hold promise for future electronic devices.
Related Concept Videos
01:31Ferromagnetism
3.4K
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...
3.4K
01:27Atomic Spectroscopy: Effects of Temperature
1.1K
Atomization, converting samples into gas-phase atoms and ions, is essential for atomic spectroscopy. The flame temperature required for atomization affects the efficiency of the atomic spectroscopic methods by increasing the atomization efficiency and the relative population of the excited and ground states.
At thermal equilibrium, the relative populations of excited and ground state atoms can be estimated using the Maxwell–Boltzmann distribution. For example, an increase in temperature...
At thermal equilibrium, the relative populations of excited and ground state atoms can be estimated using the Maxwell–Boltzmann distribution. For example, an increase in temperature...
1.1K
02:11Effects of Temperature on Free Energy
29.3K
The spontaneity of a process depends upon the temperature of the system. Phase transitions, for example, will proceed spontaneously in one direction or the other depending upon the temperature of the substance in question. Likewise, some chemical reactions can also exhibit temperature-dependent spontaneities. To illustrate this concept, the equation relating free energy change to the enthalpy and entropy changes for the process is considered:
29.3K
01:11Temperature and Thermal Equilibrium
9.9K
Heat and temperature are essential concepts for everyone every day. The study of heat and temperature is part of an area of physics known as thermodynamics. It is not always easy to distinguish heat and temperature.
The concept of temperature has evolved from the common concepts of hot and cold. The scientific definition of temperature explains more than just our sense of hot and cold. Temperature is operationally defined as the quantity measured with a thermometer. Furthermore, temperature is...
The concept of temperature has evolved from the common concepts of hot and cold. The scientific definition of temperature explains more than just our sense of hot and cold. Temperature is operationally defined as the quantity measured with a thermometer. Furthermore, temperature is...
9.9K
01:12Temperature Dependent Deformation
498
In a nonhomogeneous rod made up of steel and brass, restrained at both ends and subjected to a temperature change, several steps are involved in calculating the stress and compressive load. Due to the problem's static indeterminacy, one end support is disconnected, allowing the rod to experience the temperature change freely. Next, an unknown force is applied at the free end, triggering deformations in the rod's steel and brass portions. These deformations are then calculated and added...
498
01:18Fermi Level
2.2K
The Fermi-Dirac function is represented by an S-shaped curve indicating the probability of an energy state being occupied by an electron at a given temperature. The Fermi level is the energy level at which there is a fifty percent chance of finding an electron, and it is positioned between the lower-energy valence band and the higher-energy conduction band.
At absolute zero temperature, electrons fill all energy states up to the Fermi level, leaving upper states empty. As the temperature rises,...
At absolute zero temperature, electrons fill all energy states up to the Fermi level, leaving upper states empty. As the temperature rises,...
2.2K