Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Properties of Transition Metals02:58

Properties of Transition Metals

30.0K
Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
30.0K
Phase Transitions02:31

Phase Transitions

23.2K
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...
23.2K
Cooperative Allosteric Transitions01:58

Cooperative Allosteric Transitions

8.8K
Cooperative allosteric transitions can occur in multimeric proteins, where each subunit of the protein has its own ligand-binding site. When a ligand binds to any of these subunits, it triggers a conformational change that affects the binding sites in the other subunits; this can change the affinity of the other sites for their respective ligands. The ability of the protein to change the shape of its binding site is attributed to the presence of a mix of flexible and stable segments in the...
8.8K
Phase Transitions: Melting and Freezing02:39

Phase Transitions: Melting and Freezing

15.2K
Heating a crystalline solid increases the average energy of its atoms, molecules, or ions, and the solid gets hotter. At some point, the added energy becomes large enough to partially overcome the forces holding the molecules or ions of the solid in their fixed positions, and the solid begins the process of transitioning to the liquid state or melting. At this point, the temperature of the solid stops rising, despite the continual input of heat, and it remains constant until all of the solid is...
15.2K
Phase Transitions: Vaporization and Condensation02:39

Phase Transitions: Vaporization and Condensation

21.5K
The physical form of a substance changes on changing its temperature. For example, raising the temperature of a liquid causes the liquid to vaporize (convert into vapor). The process is called vaporization—a surface phenomenon. Vaporization occurs when the thermal motion of the molecules overcome the intermolecular forces, and the molecules (at the surface) escape into the gaseous state. When a liquid vaporizes in a closed container, gas molecules cannot escape. As these gas phase molecules...
21.5K
Phase Transitions: Sublimation and Deposition02:33

Phase Transitions: Sublimation and Deposition

20.2K
Some solids can transition directly into the gaseous state, bypassing the liquid state, via a process known as sublimation. At room temperature and standard pressure, a piece of dry ice (solid CO2) sublimes, appearing to gradually disappear without ever forming any liquid. Snow and ice sublimate at temperatures below the melting point of water, a slow process that may be accelerated by winds and the reduced atmospheric pressures at high altitudes. When solid iodine is warmed, the solid sublimes...
20.2K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Natural polysaccharides targeting mitochondrial function for colorectal cancer prevention and treatment: mechanisms and nano-delivery strategies.

Chinese medicine·2026
Same author

Development and Validation of a Predictive Model Using Logistic Regression and Machine Learning for Carotid Artery Atherosclerosis Risk in Postmenopausal Han Women from Northern China: A Retrospective Case-Control Study.

International journal of women's health·2026
Same author

Large thermoelectric effect driven by high-order anharmonicity from synergistic lone-pair electrons and rattling modes in K<sub>3</sub>Au<sub>3</sub>Sb<sub>2</sub>.

Physical chemistry chemical physics : PCCP·2026
Same author

Gate-tunable giant negative magnetoresistance in tellurene driven by quantum geometry.

Nature communications·2026
Same author

<i>In Situ</i> Study of the Ferroelectric-Antiferroelectric Phase Transition in Hf<sub>1-<i>x</i></sub>Zr<sub><i>x</i></sub>O<sub>2</sub> at Elevated Temperatures up to 600 °C.

Nano letters·2026
Same author

Breakdown of Ohm's Law by Disorders in Low-Dimensional Transistors.

Nano letters·2026

Related Experiment Video

Updated: Feb 8, 2026

Demonstrating the Simplicity and In Situ Temperature Monitoring of the Mechanochemical Synthesis of Metal Chalcogenides Suitable for Thermoelectrics
04:09

Demonstrating the Simplicity and In Situ Temperature Monitoring of the Mechanochemical Synthesis of Metal Chalcogenides Suitable for Thermoelectrics

Published on: August 30, 2024

815

Giant Room-Temperature Magnetocaloric Effect in Two-Dimensional Ternary Transition Metal Chalcogenides.

Yangjun Hou1, Xiong Xu1, Guangwei Zhai1

  • 1School of Physics, Hunan Key Laboratory of Super Microstructure and Ultrafast Process, Hunan Key Laboratory of Nanophotonics and Devices, State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China.

The Journal of Physical Chemistry Letters
|February 6, 2026
PubMed
Summary

Ternary transition metal chalcogenides show significant potential for room-temperature magnetic refrigeration. Ti2WS4 and Ti2WSe4 exhibit large entropy changes, driven by magnetic anisotropy and exchange coupling.

More Related Videos

Thermochemical Studies of NiII and ZnII Ternary Complexes Using Ion Mobility-Mass Spectrometry
16:11

Thermochemical Studies of NiII and ZnII Ternary Complexes Using Ion Mobility-Mass Spectrometry

Published on: June 8, 2022

2.8K
Electrospray Deposition of Uniform Thickness Ge23Sb7S70 and As40S60 Chalcogenide Glass Films
08:38

Electrospray Deposition of Uniform Thickness Ge23Sb7S70 and As40S60 Chalcogenide Glass Films

Published on: August 19, 2016

9.1K

Related Experiment Videos

Last Updated: Feb 8, 2026

Demonstrating the Simplicity and In Situ Temperature Monitoring of the Mechanochemical Synthesis of Metal Chalcogenides Suitable for Thermoelectrics
04:09

Demonstrating the Simplicity and In Situ Temperature Monitoring of the Mechanochemical Synthesis of Metal Chalcogenides Suitable for Thermoelectrics

Published on: August 30, 2024

815
Thermochemical Studies of NiII and ZnII Ternary Complexes Using Ion Mobility-Mass Spectrometry
16:11

Thermochemical Studies of NiII and ZnII Ternary Complexes Using Ion Mobility-Mass Spectrometry

Published on: June 8, 2022

2.8K
Electrospray Deposition of Uniform Thickness Ge23Sb7S70 and As40S60 Chalcogenide Glass Films
08:38

Electrospray Deposition of Uniform Thickness Ge23Sb7S70 and As40S60 Chalcogenide Glass Films

Published on: August 19, 2016

9.1K

Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Magnetism

Background:

  • Two-dimensional (2D) materials are promising for advanced technologies.
  • Magnetic refrigeration offers an environmentally friendly alternative to conventional cooling.
  • Developing materials with high magnetocaloric effect (MCE) near room temperature is crucial.

Purpose of the Study:

  • To investigate the magnetic properties and magnetocaloric effect (MCE) of ternary transition metal chalcogenides A2MX4.
  • To understand the underlying mechanisms governing MCE in these materials.
  • To explore strategies for enhancing MCE through strain and doping.

Main Methods:

  • First-principles calculations were employed to study magnetic exchange interactions, magnetic anisotropy (MAE), and MCE.
  • Perturbation theory was used to analyze the contributions to MCE.
  • The effects of strain and carrier doping on MAE and Curie temperature were investigated.

Main Results:

  • Ti2WS4 and Ti2WSe4 exhibit large entropy changes (5.97 and 5.51 μJ m-2 K-1, respectively) near room temperature.
  • Strong second-nearest-neighbor exchange coupling and a large MAE (~10 meV) significantly contribute to MCE.
  • MAE is attributed to the coupling of dx2-y2 and dz2 orbitals of the W atom.
  • Strain and carrier doping effectively modulate MAE and Curie temperature, enhancing MCE.

Conclusions:

  • Ternary transition metal chalcogenides are promising candidates for room-temperature magnetic refrigeration.
  • Understanding the interplay of magnetic exchange, MAE, and electronic structure is key to designing high-performance MCE materials.
  • Strain and doping offer viable pathways to optimize MCE for practical applications in magnetic cooling devices.