Related Experiment Video
Updated: Jan 16, 2026
06:53
Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
Published on: June 9, 2023
2.6K
Mechanically robust and thermodynamically stable FeSc2Z4 (Z = S, Se) spinels for future spintronic architectures
Ateeq Anwar1, N A Noor1, Ghulam M Mustafa2
1Department of Physics, University of Sargodha 40100 Sargodha Pakistan naveed.noor@uos.edu.pk.
RSC Advances
|September 29, 2025
Summary
This study explores FeSc2(S,Se)4 spinels for spintronics. FeSc2S4 shows higher stability and a transition to a half-metallic ferromagnetic state under pressure, indicating potential for next-generation electronic devices.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Solid State Chemistry
Background:
- Spintronics utilizes spin polarization in materials for advanced electronics.
- Semiconductors and metals with intrinsic magnetic ordering are key for spintronic applications.
- FeSc2Z4 (Z = S, Se) spinel compounds are candidates for spintronic materials.
Purpose of the Study:
- To systematically investigate the structural, mechanical, electronic, and thermodynamic properties of FeSc2(S,Se)4 spinels.
- To assess their stability and potential for spintronic and magneto-electronic applications.
- To understand the effect of pressure on their electronic and magnetic behavior.
Main Methods:
- Density Functional Theory (DFT) using the WIEN2k code.
- Calculation of structural parameters, formation enthalpies, phonon frequencies, elastic constants, and electronic band structures.
- Application of the quasi-harmonic Debye model (GIBBS2 framework) for thermodynamic analysis.
Main Results:
- Calculated lattice constants agree with experimental values.
- FeSc2S4 exhibits higher thermodynamic stability with a negative formation enthalpy.
- Both spinels are structurally stable with positive phonon frequencies and show mechanical robustness.
- Electronic properties reveal band gap reduction under pressure, with FeSc2S4 transitioning to a half-metallic ferromagnetic state.
- Ferrimagnetic behavior with a total magnetic moment of 4.00μB per formula unit was observed.
- Thermodynamic analysis indicates good thermal stability and vibrational integrity.
Conclusions:
- FeSc2(S,Se)4 spinels possess favorable structural, mechanical, and thermodynamic properties.
- FeSc2S4 demonstrates potential as a half-metallic ferromagnet under pressure.
- These materials show promise for spintronic and magneto-electronic device applications.
Related Concept Videos
02:42Valence Bond Theory
11.2K
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...
11.2K
01:29Field Effect Transistor
1.1K
Field-effect transistors (FETs) are integral to electronic circuits and distinguished by their three-terminal setup: the gate, drain, and source. These transistors operate as unipolar devices, which utilize either electrons or holes as charge carriers, in contrast to bipolar transistors, which use both types of carriers. The primary function of the FET is to modulate the flow of these carriers from the source to the drain through a channel. The voltage difference between the gate and source...
1.1K
03:02Colors and Magnetism
14.0K
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...
14.0K
01:31Ferromagnetism
3.0K
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...
3.0K
01:17Characteristics of MOSFET
949
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...
949
01:24Metal-Semiconductor Junctions
905
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...
905