Results 141 to 150 of about 854 (179)

Anomalous barocaloric effect in solid magnetic materials

Journal of Physics: Condensed Matter, 2011
In this paper, we systematically discuss the barocaloric effect in solid magnetic materials undergoing both second and first order phase transition. For this purpose, we use a model of localized magnetic moments, including the magnetoelastic coupling and the Zeemann interaction.
R P, Santana, N A, de Oliveira, P J, von Ranke   +2 more
openaire   +2 more sources

Barocaloric effect in metamagnetic shape memory alloys

physica status solidi (b), 2014
AbstractWe report on calorimetric measurements under hydrostatic pressure in a series of composition related metamagnetic shape memory alloys. We show that metamagnetic shape memory alloys exhibit a barocaloric effect whose magnitude compares well to the magnetocaloric effect exibited by this kind of alloys.
Manosa Lluis, SternTaulats Enric, Planes Antoni, Lloveras Pol, Barrio Maria, Tamarit JosepLluis, Emre Baris, Yuce Suheyla, Fabbrici Simone, Albertini Franca   +9 more
openaire   +3 more sources

Barocaloric Effects in Dialkylammonium Halide Salts

Journal of the American Chemical Society
Barocaloric effects─solid-state thermal changes induced by the application and removal of hydrostatic pressure─offer the potential for energy-efficient heating and cooling without relying on volatile refrigerants. Here, we report that dialkylammonium halides─organic salts featuring bilayers of alkyl chains templated through hydrogen bonds to halide ...
Jinyoung Seo, Rahil Ukani, Juanjuan Zheng, Jason D. Braun, Sicheng Wang, Faith E. Chen, Hong Ki Kim, Selena Zhang, Catherine Thai, Ryan D. McGillicuddy, Hao Yan, Joost J. Vlassak, Jarad A. Mason   +12 more
openaire   +2 more sources

Electrocaloric and barocaloric effects in organic materials

2023
Electrocaloric (EC) and barocaloric (BC) materials undergo reversible thermal changes in response to changes in applied electric field and pressure, respectively. These materials could potentially be exploited in novel solid-state cooling systems that may replace current vapour-compression systems, which are environmentally harmful, noisy, and ...
openaire   +1 more source

Magnetocaloric and barocaloric effects: Theoretical description and trends

International Journal of Refrigeration, 2014
Abstract In this review paper we present a theoretical description of the magnetocaloric and barocaloric effects in metallic compounds. The theoretical formulation is separated in two categories namely, [1] systems whose magnetism is due to localized magnetic moments [2] systems whose magnetism is due to itinerant electrons.
N.A. de Oliveira, P.J. von Ranke, A. Troper   +2 more
openaire   +1 more source

Barocaloric effects in barium-dicalcium propionate salts

2020
Fluid refrigerants used in vapour-compression cooling systems such as air conditioners and fridges contribute to environmental damage. Should barium dicalcium organic salts show persistent entropy changes under pressure that are reversible, they may serve as environmentally friendly solid-state barocaloric cooling materials.
openaire   +1 more source

Barocaloric and magnetocaloric effects in La(Fe0.89Si0.11)13

Journal of Applied Physics, 2008
In this paper we calculate the barocaloric and the magnetocaloric effects under applied pressure in the compound La(Fe0.89Si0.11)13. We use a microscopical model in the framework of the band theory of magnetism, where the Coulomb interaction between itinerant electrons is treated in the mean field approach.
L. G. de Medeiros, N. A. de Oliveira, A. Troper   +2 more
openaire   +1 more source

Cooling by adiabatic application of pressure – the barocaloric effect

Physica B: Condensed Matter, 2000
Abstract A novel principle for cooling by adiabatic pressure-application is introduced. A pressure induced structural and/or magnetic phase transition is used to change the degeneracy of the crystal-field ground state. The resulting change in entropy can then be used to achieve adiabatic cooling in a similar way to the well-known cooling by adiabatic
Th Strässle, A Furrer, K.A Müller
openaire   +1 more source

Cooling by adiabatic (DE)pressurization - the barocaloric effect

High Pressure Research, 2000
Abstract The barocaloric effect reflects a new cooling principle at low temperatures without the need of liquefied gases nor magnetic fields as used in other cooling techniques. A pressure induced structural and/or magnetic phase transition is used to obtain a significant change in the system's entropy which leads to its cooling if done adiabatically ...
Th Strässle, A. Furrer
openaire   +1 more source

Colossal barocaloric effect of phase-change fatty acids

Applied Physics Letters
Materials exhibiting caloric effects can serve as green alternatives in place of the gas refrigerants used in traditional vapor refrigeration systems, which are facing rising energy usage and environmental issues. This study investigates the barocaloric effect of fatty acids, which are typical phase-change materials.
Tingjiao Xiong, Jianchao Lin, Tingting Zhou, Guoyou Shi, Tingting Ye, Xiaomei Pan, Keke Liu, Runjian Jiang, Ranran Zhang, Wenhai Song, Peng Tong, Yuping Sun   +11 more
openaire   +1 more source