Related Experiment Video
Updated: May 5, 2026
09:06
Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
6.6K
Magnetic phase transitions and superconductivity in strained FeTe
A Ciechan1, M J Winiarski, M Samsel-Czekała
1Institute of Physics, Polish Academy of Sciences, aleja Lotników 32/46, 02-668 Warsaw, Poland.
Summary
Hydrostatic pressure and strain induce magnetic phase transitions in iron telluride (FeTe). These changes, particularly to antiferromagnetic single-stripe ordering, are linked to superconductivity in FeTe thin films.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Solid State Physics
Background:
- Iron telluride (FeTe) exhibits complex magnetic ordering.
- Understanding its magnetic structure is key to exploring its electronic properties.
Purpose of the Study:
- Investigate the effects of hydrostatic pressure and ab-plane strain on FeTe's magnetic structure.
- Determine the relationship between magnetic ordering and superconductivity in FeTe.
Main Methods:
- First-principles calculations were employed.
- Simulations analyzed the influence of hydrostatic pressure and varying strain levels on FeTe's crystal structure and magnetic ordering.
Main Results:
- Antiferromagnetic double-stripe ordering transitions to ferromagnetic ordering at 2 GPa or 3% compressive strain.
- Tensile strain (<2%) induces a transition to antiferromagnetic single-stripe ordering.
- This single-stripe phase correlates with superconductivity in FeTe thin films.
Conclusions:
- The position of tellurium (Te) atoms is critical for the magnetic and superconducting properties of iron chalcogenides.
- Magnetic phase transitions driven by pressure and strain offer pathways to tune FeTe's properties.
- Antiferromagnetic fluctuations are strongly linked to the superconducting state in FeTe.
Related Concept Videos
01:28Types Of Superconductors
1.7K
A superconductor is a substance that offers zero resistance to the electric current when it drops below a critical temperature. Zero resistance is not the only interesting phenomenon as materials reach their transition temperatures. A second effect is the exclusion of magnetic fields. This is known as the Meissner effect. A light, permanent magnet placed over a superconducting sample will levitate in a stable position above the superconductor. High-speed trains that levitate on strong...
1.7K
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
01:24Superconductor
1.9K
A substance that reaches superconductivity, a state in which magnetic fields cannot penetrate, and there is no electrical resistance, is referred to as a superconductor. In 1911, Heike Kamerlingh Onnes of Leiden University, a Dutch physicist, observed a relation between the temperature and the resistance of the element mercury. The mercury sample was then cooled in liquid helium to study the linear dependence of resistance on temperature. It was observed that, as the temperature decreased, the...
1.9K
01:27Magnetic Fields
6.0K
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...
6.0K
01:21Phase Transitions
108
A phase transition is the process in which a substance changes from one state of matter to another, like from a solid to a liquid, liquid to gas, or vice versa, at a specific temperature and under given pressure conditions. This change is spontaneous and is affected by alterations in temperature and pressure. These parameters impact the strength of the forces between molecules (intermolecular forces) in the substance.During a phase transition, both the initial and final phases of the substance...
108
02:31Phase Transitions
19.1K
Whether solid, liquid, or gas, a substance's state depends on the order and arrangement of its particles (atoms, molecules, or ions). Particles in the solid pack closely together, generally in a pattern. The particles vibrate about their fixed positions but do not move or squeeze past their neighbors. In liquids, although the particles are closely spaced, they are randomly arranged. The position of the particles are not fixed—that is, they are free to move past their neighbors to...
19.1K