Results 1 to 10 of about 28,460 (303)

Direct measurements of the magnetic entropy change [PDF]

Review of Scientific Instruments, 2015
An experimental device that can accurately measure the magnetic entropy change, Δs, as a function of temperature, T, and magnetic field, H, is presented. The magnetic field source is in this case a set of counter-rotating concentric Halbach-type magnets, which produce a highly homogeneous applied field with constant orientation. The field may be varied
Kaspar K Nielsen, Rasmus Bjørk, D Eriksen   +2 more
exaly   +5 more sources

An investigation on the magnetic entropy change of Ni38Co12Mn25V25

Results in Surfaces and Interfaces
Ni-Mn based Heusler alloys are interesting class of ferromagnetic materials that performs well in the field of spintronics, shape memory alloys and solid-state refrigeration. In this work, the phase stability, magnetic properties and critical behavior of
Kowsalya Murugan, Sakunthala Ayyasamy, Kathirvel Venugopal   +2 more
doaj   +2 more sources

Utilization of high entropy in rare earth-based magnetocaloric metallic glasses

Journal of Materials Research and Technology, 2022
In this study, the magnetic behavior and magnetocaloric effect (MCE) of Dy18Er18Y18Ni26Al20 and Dy13.5Er13.5Y13.5Gd13.5Ni26Al20 high-entropy bulk metallic glasses (BMGs) were systematically investigated, as well as Dy27Er27Ni26Al20 and Dy54Ni26Al20 ...
Lin Xue, Liliang Shao, Zongzhen Li, Zhida Han, Baosen Zhang, Juntao Huo, Xinming Wang, Shuaishuai Zhu, Bin Qian, Jiangbo Cheng, Baolong Shen   +10 more
doaj   +1 more source

Correlation between linear magnetostriction and magnetocaloric effect in the Fe7Se8 single crystals

Materials Research Express, 2022
The effect of the change in size under the influence of an applied magnetic field (magnetostriction) was studied in Fe _7 Se _8 single crystals. It was shown that a systematic change in the unit-cell constants, induced by an external magnetic field and ...
Y Konopelnyk, R Żuberek, A Nabiałek, H Szymczak, R Puźniak   +4 more
doaj   +1 more source

Realistic first-principles calculations of the magnetocaloric effect: applications to hcp Gd

Materials Research Letters, 2022
We present an efficient computational approach to evaluate field-dependent entropy of magnetocaloric materials from ab-initio methods. The temperature dependence is reported for the entropy change, specific heat and magnetization for hcp Gd.
R. Martinho Vieira, O. Eriksson, T. Björkman, A. Bergman, H. C. Herper   +4 more
doaj   +1 more source

Ball Milled Gd Flakes Subjected to Heat Treatments: Structure, Magnetic and Magnetocaloric Properties

Magnetochemistry, 2022
Gd flake samples were prepared by conventional ball milling technique starting from rapidly quenched Gd ribbons and followed by vacuum annealing in different conditions. Heat treatments were conducted in a vacuum at selected temperatures up to 600 K. The
Andrey V. Svalov, Dmitriy S. Neznakhin, Andrey V. Arkhipov, Sergey V. Andreev, Nadezhda V. Selezneva, Aitor Larrañaga, Galina V. Kurlyandskaya   +6 more
doaj   +1 more source

The multiple magnetic transitions and magnetic entropy change of RGa compounds [PDF]

SCIENTIA SINICA Physica, Mechanica & Astronomica, 2021
Magnetic refrigerant materials working at middle and low temperature range have drawn much attention because they can be used for gas liquefaction such as oxygen, nitrogen, hydrogen and helium. It is continuous goal for researchers to explore and obtain magnetic refrigerant materials with large magnetic entropy change, wide refrigerant temperature span,
XinQi ZHENG, JiaWang XU, ShuXian YANG, Lei XI, Hu ZHANG, ShouGuo WANG, BaoGen SHEN   +6 more
openaire   +1 more source

Effect of Secondary Phases on Multi-Step Phase Transitions and Magnetocaloric Properties in MnFe-Based Alloys

Metals, 2022
This study investigated the effect of the secondary phases on multi-step phase transitions and the magnetocaloric properties depending on the Ge content in the MnFeCoPSiGe alloys.
A-Young Lee, Min-Ha Lee, Song-Yi Kim, JunHee Han, Ki-Hoon Kang, Jong-Woo Kim   +5 more
doaj   +1 more source

Magnetocaloric effect in Sr2FeMoO6/Ag composites [PDF]

Processing and Application of Ceramics, 2015
The enhanced low-field magnetocaloric effect was investigated for double perovskite Sr2FeMoO6 - silver (SFMO/Ag) composites with 0, 5 and 10 wt.% of Ag. A phenomenological model was used to predict magnetocaloric properties of SFMO/Ag composites, such as
Mahmoud A. Hamad
doaj   +1 more source

Hysteresis loss reduction and magnetocaloric effect improvement in the Ni-Co-Mn-In alloys

AIP Advances, 2020
In this work the magnetocaloric effect (MCE) and hysteresis losses of Ni45Co5Mn(37-x)In(13+x) alloy (x= 0, 0.4) are studied. Also we propose a new approach in calculating the average entropy change to eliminate the overestimation of the magnetic entropy ...
Mohammadreza Ghahremani, Amir Aslani, Marjan Hosseinnia, Lawrence H. Bennett   +3 more
doaj   +1 more source