Results 21 to 30 of about 6,121 (227)

Investigation of microstructural influence on entropy change in magnetocaloric polycrystalline samples of NiMnGaCu ferromagnetic shape memory alloy

Journal of Materials Research and Technology, 2020
Among NiMnGa-based quaternary systems, NiMnGaCu exhibits an interesting giant magnetocaloric effect thanks to the temperature overlapping of magnetic transition and thermoelastic martensitic transformation (TMT), in particular for compositions with ≈6 at%
E. Villa, C. Tomasi, A. Nespoli, F. Passaretti, G. Lamura, F. Canepa   +5 more
doaj   +1 more source

Theoretical analysis of magnetic properties and the magnetocaloric effect using the Blume-Capel model

Condensed Matter Physics, 2022
This work investigates the magnetic properties and the magnetocaloric effect in the spin-1 Blume-Capel model. The study was carried out using the mean-field theory from the Bogoliubov inequality to obtain the expressions of free energy, magnetization and
S. Oliveira, R. H. M. Morais, J. P. Santos, F. C. Sá Barreto   +3 more
doaj   +1 more source

Freestanding and flexible composites of magnetocaloric Gd5(Si,Ge)4 microparticles embedded in thermoplastic poly(methyl methacrylate) matrix

Materials & Design, 2020
The implementation of processed magnetic materials onto thermoplastics can be an approach for practical use of brittle intermetallic materials on device development with the advantage of enlarging the range of applications.
Vivian M. Andrade, Nathalie B. Barroca, Ana L. Pires, João H. Belo, André M. Pereira, Kleber R. Pirota, João P. Araújo   +6 more
doaj   +1 more source

Magnetocaloric performance of the three-component Ho1-xErxNi2 (x = 0.25, 0.5, 0.75) Laves phases as composite refrigerants

Scientific Reports, 2022
To date, significant efforts have been put into searching for materials with advanced magnetocaloric properties which show promise as refrigerants and permit realization of efficient cooling.
Jacek Ćwik, Yurii Koshkid’ko, Konstantin Nenkov, Evgenia Tereshina-Chitrova, Małgorzata Małecka, Bruno Weise, Karolina Kowalska   +6 more
doaj   +1 more source

Multi-pass cold rolling and wire drawing process of gadolinium and its magnetocaloric effect

Journal of Materials Research and Technology, 2022
Owing to low ductility of magnetocaloric material (MCM)s, the plastic deformation process is quite challenging, and information available on the deformation process of MCMs is limited. In this study, the cold rolling and wire drawing processes of Gd wire
Jeong Hun Kim, Da Seul Shin, Jun Seok Yoon, Kwang Seok Lee   +3 more
doaj   +1 more source

Simulated magnetocaloric properties of MnCr2O4 spinel [PDF]

Processing and Application of Ceramics, 2016
The magnetocaloric properties of MnCr2O4 spinel have been simulated based on a phenomenological model. The simulation of magnetization as function of temperature is used to explore magnetocaloric properties such as magnetic entropy change, heat capacity ...
Mahmoud A. Hamad
doaj   +1 more source

Large magnetocaloric effect in EuGd2O4 and EuDy2O4 [PDF]

, 2022
Magnetization, heat capacity and direct measurements of the magnetocaloric effect show that EuGd2O4 and EuDy2O4 have a remarkably large magnetocaloric effect at cryogenic temperatures, owing to their high magnetic density and low ordering temperatures ...
Palacios, Elias, Doi, Yoshihiro, Palacios, E., Doi, Y., Hinatsu, Yukio, Romero, J., Hinatsu, Y., Evangelisti, Marco, Sáez-Puche, R., Romero, Julio C., Evangelisti, M.   +10 more
core   +1 more source

Oil-based magnetic fluids. Synthesis, properties, and application prospects

Известия высших учебных заведений: Нефть и газ, 2023
In this work, magnetite crude oil-based magnetic fluids have been synthesized and studied. Their physicochemical parameters (density, viscosity, magnetic phase particle size) have been determined.
V. V. Korolev, A. G. Ramazanova, O. V. Balmasova, V. I. Yashkova, A. I. Valeev   +4 more
doaj   +1 more source

Магнитные и магнитокалорические характеристики сплава Mn1.9Cu0.1Sb

, 2023
The magnetic and magnetocaloric characteristics of the Mn1.9Cu0.1Sb alloy were studied. The presence of a relatively sharp decrease in the magnetization in the region of 100 K is established, which, according to ab initio calculations, can be interpreted
Mashirov, A. V., Ткаченко, Тамара Михайловна, Mitsiuk, V. I., Tkachenko, V., Golovchan, A. V., Surowiec, Z., Gurbanovich, G A., Valkov, V. I.   +7 more
core   +1 more source

Improvement of magnetocaloric properties of Gd-Ge-Si alloys by alloying with iron

EPJ Web of Conferences, 2013
The influence of annealing of Gd5Ge2Si2Fex alloys at 1200°C and of alloying with various amount of iron on structure as well as thermal and magnetocaloric properties is investigated.
Erenc-Sędziak T., Cieślak G., Kowalczyk M., Ferenc J., Kulik T.   +4 more
doaj   +1 more source