Related Experiment Video
Updated: Dec 12, 2025
12:20
Sputter Growth and Characterization of Metamagnetic B2-ordered FeRh Epilayers
Published on: October 5, 2013
14.9K
Pressure-Dependent Intermediate Magnetic Phase in Thin Fe3GeTe2 Flakes.
Heshen Wang1,2, Runzhang Xu3, Cai Liu2
1School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou 510275, P. R. China.
The Journal of Physical Chemistry Letters
|August 14, 2020
Summary
Ferromagnetism in Fe3GeTe2 flakes evolves under pressure, showing a new intermediate state above 7 GPa. This transition impacts magnetic properties and domain structure, offering insights into layered magnetic materials.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Magnetism
Background:
- Layered magnetic materials like Fe3GeTe2 are promising for spintronic applications.
- Understanding their magnetic properties under external stimuli is crucial for device development.
Purpose of the Study:
- To investigate the pressure- and temperature-dependent evolution of ferromagnetism in Fe3GeTe2.
- To elucidate the nature of magnetic phase transitions and their underlying mechanisms.
Main Methods:
- In situ magnetic circular dichroism (MCD) spectroscopy was employed to probe magnetic behavior.
- High-pressure experiments were conducted using specialized equipment.
- First-principles calculations were performed to complement experimental findings.
Main Results:
- A rectangular hysteresis loop was observed below 7 GPa, transitioning to an intermediate, skewed loop above this pressure.
- Coercive field and Curie temperature decreased with increasing pressure, indicating reduced exchange interaction and anisotropy.
- A labyrinthine domain structure was identified in the intermediate phase, explained by Jagla's theory.
- A weak structural transition around 6 GPa correlated with changes in Fe-Fe bond length and magnetic interactions.
Conclusions:
- Pressure significantly alters the magnetic properties and phase behavior of Fe3GeTe2.
- The observed intermediate magnetic state is linked to a delicate balance between exchange interaction and magneto-crystalline anisotropy.
- Structural changes play a critical role in modulating magnetic interactions in this layered material.
More Related Videos
09:06Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
8.4K
07:42Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains
Published on: July 20, 2022
3.1K
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
01:30Paramagnetism
2.9K
Paramagnets are materials with unpaired electrons that possess a finite magnetic moment. In the absence of a magnetic field, these moments are randomly oriented, and thus the net moment is zero. Under an external field, a torque acting on the moments tends to align them along the field's direction. However, the random thermal motion of electrons produces a torque opposite to the external field and tries to disorient the moments. These two competing effects align only a few moments along the...
2.9K
01:28Magnetostatic Boundary Conditions
1.5K
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...
1.5K
01:27Magnetic Fields
6.9K
A moving charge or a current creates a magnetic field in the surrounding space, in addition to its electric field. The magnetic field exerts a force on any other moving charge or current that is present in the field. Like an electric field, the magnetic field is also a vector field. At any position, the direction of the magnetic field is defined as the direction in which the north pole of a compass needle points.
A magnetic field is defined by the force that a charged particle experiences...
A magnetic field is defined by the force that a charged particle experiences...
6.9K
02:42Valence Bond Theory
10.8K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
10.8K
03:02Colors and Magnetism
13.5K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
13.5K