Jove
Visualize
Contáctanos
JoVE
x logofacebook logolinkedin logoyoutube logo
ACERCA DE JoVE
Visión GeneralLiderazgoBlogCentro de Ayuda JoVE
AUTORES
Proceso de PublicaciónConsejo EditorialAlcance y PolíticasRevisión por ParesPreguntas FrecuentesEnviar
BIBLIOTECARIOS
TestimoniosSuscripcionesAccesoRecursosConsejo Asesor de BibliotecasPreguntas Frecuentes
INVESTIGACIÓN
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchivo
EDUCACIÓN
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualCentro de Recursos para ProfesoresSitio de Profesores
Términos y Condiciones de Uso
Política de Privacidad
Políticas

Videos de Conceptos Relacionados

Refrigerators and Heat Pumps01:07

Refrigerators and Heat Pumps

2.4K
Refrigerators or heat pumps are heat engines operating in a reverse direction. For a refrigerator, the focus is on removing heat from a specific area, whereas, for a heat pump, the focus is on dumping heat into one particular area. A refrigerator (or heat pump) absorbs heat Qc from the cold reservoir at Kelvin temperature Tc and discards heat Qh to the hot reservoir at Kelvin temperature Th, while work W is done on the engine’s working substance.
A household refrigerator removes heat from...
2.4K
Adiabatic Processes for an Ideal Gas01:18

Adiabatic Processes for an Ideal Gas

3.3K
When an ideal gas is compressed adiabatically, that is, without adding heat, work is done on it, and its temperature increases. In an adiabatic expansion, the gas does work, and its temperature drops. Adiabatic compressions actually occur in the cylinders of a car, where the compressions of the gas-air mixture take place so quickly that there is no time for the mixture to exchange heat with its environment. Nevertheless, because work is done on the mixture during the compression, its...
3.3K
Ferromagnetism01:31

Ferromagnetism

2.5K
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...
2.5K
Phase Transitions: Sublimation and Deposition02:33

Phase Transitions: Sublimation and Deposition

18.0K
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...
18.0K
Superconductor01:24

Superconductor

1.2K
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...
1.2K
The Carnot Cycle and the Second Law of Thermodynamics01:20

The Carnot Cycle and the Second Law of Thermodynamics

2.9K
The Carnot engine works between two heat reservoirs of fixed temperatures. The Carnot cycle begs the following question: Is it possible to devise a heat engine that is more efficient than a Carnot engine between two fixed temperatures? The answer lies in designing a Carnot refrigerator.
Since the individual steps in a Carnot cycle can be reversed, the entire cycle is, thus, reversible. If a Carnot cycle is reversed, it becomes a Carnot refrigerator. It extracts heat Qc from a cold reservoir at...
2.9K

También podría leer

Artículos Relacionados

Artículos vinculados a este trabajo por autores compartidos, revista y gráfico de citas.

Ordenar por
Same author

A C-H activation-based multicomponent reaction approach towards benzimidazole-linked covalent organic frameworks for proton conduction.

Chemical science·2026
Same author

Theretofore Highest Efficiency in Vacuum-Deposited Organic Solar Cells Originating From Triarylamine-Based Small-Molecule Donors Containing Fused Heterocycle Units.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)·2026
Same author

Risk factors and predictive model for gas-related adverse events following peroral endoscopic myotomy.

Surgical endoscopy·2026
Same author

Optical-controlled magnon transport based on spin crossover switched molecular magnets.

Smart molecules : open access·2026
Same author

Engineering covalent organic frameworks for decoupled photocatalytic and dark photocatalytic synthesis of H<sub>2</sub>O<sub>2</sub>.

Chemical science·2026
Same author

Enhancing Magneto-Optical Activity via Coordination Distortion in Chiral Er<sub>4</sub>M<sub>8</sub> Clusters.

Journal of the American Chemical Society·2026

Video Experimental Relacionado

Updated: Sep 15, 2025

Experimental System of Solar Adsorption Refrigeration with Concentrated Collector
07:18

Experimental System of Solar Adsorption Refrigeration with Concentrated Collector

Published on: October 18, 2017

14.7K

Temperatura por debajo de 30 mK lograda por refrigeración de desmagnetización adiabática

Qiao-Fei Xu1, Xin-Yang Liu2, Ruo-Tong Wu1

  • 1State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China.

Journal of the American Chemical Society
|July 17, 2025
PubMed
Resumen

La refrigeración por desmagnetización adiabática (ADR) utilizando KYb3F10 logra temperaturas ultrabajas por debajo de 50 mK. Este nuevo refrigerante ofrece un cambio de entropía magnética significativamente mayor que las opciones comerciales, superando un desafío de diseño clave.

Más Videos Relacionados

Advanced Experimental Methods for Low-temperature Magnetotransport Measurement of Novel Materials
10:36

Advanced Experimental Methods for Low-temperature Magnetotransport Measurement of Novel Materials

Published on: January 21, 2016

10.7K
Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
11:21

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Published on: March 30, 2017

7.6K

Videos de Experimentos Relacionados

Last Updated: Sep 15, 2025

Experimental System of Solar Adsorption Refrigeration with Concentrated Collector
07:18

Experimental System of Solar Adsorption Refrigeration with Concentrated Collector

Published on: October 18, 2017

14.7K
Advanced Experimental Methods for Low-temperature Magnetotransport Measurement of Novel Materials
10:36

Advanced Experimental Methods for Low-temperature Magnetotransport Measurement of Novel Materials

Published on: January 21, 2016

10.7K
Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
11:21

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Published on: March 30, 2017

7.6K

Área de la Ciencia:

  • Las criogénicas
  • Física de la materia condensada
  • Ciencias de los materiales

Sus antecedentes:

  • La refrigeración por desmagnetización adiabática (ADR) es esencial para la investigación de temperaturas ultrabajas, pero el progreso está limitado por el rendimiento del refrigerante.
  • Los refrigerantes existentes luchan para lograr un gran cambio de entropía magnética (-ΔSm) y bajas temperaturas de orden (T0).

Objetivo del estudio:

  • Desarrollar un nuevo refrigerante magnético que supere las limitaciones de -ΔSm y T0 en ADR.
  • Para demostrar un material capaz de alcanzar temperaturas ultrabajas de manera eficiente.

Principales métodos:

  • Incorporación de intercambio magnético débil e interacciones dipolares en el imán frustrado KYb3F10.
  • Caracterización de las propiedades magnéticas y realización de pruebas de ADR.

Principales resultados:

  • KYb3F10 exhibe un gran ΔSm, que supera los refrigerantes comerciales hasta en un 219%.
  • El material muestra una baja temperatura de orden (T0) por debajo de 50 mK.
  • Las pruebas prácticas de ADR alcanzaron una temperatura mínima de 27,2 mK.

Conclusiones:

  • KYb3F10 es un refrigerante de alto rendimiento para ADR a temperaturas ultrabajas.
  • Este trabajo resuelve el desafío de larga data de diseñar refrigerantes magnéticos con grandes ΔSm y bajos T0.