The Influence of Yb Doping and Sintering Conditions on the Magnetocaloric and Mechanical Properties of EuS

For this work, europium monosulfide (EuS) powders were prepared by sulfurizing Eu2O3 powder with CS2 gas. The synthesized EuS powders were sintered by SPS at temperatures in the 800–1600 °C range for 0.33–1 h at 50 MPa under vacuum conditions. The influences of Yb doping and sintering conditions on...

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Bibliographic Details
Published in:Molecules (Basel, Switzerland) Switzerland), 2022-09, Vol.27 (17), p.5660
Main Authors: Li, Liang, Chen, Yuqi, He, Junbao, Zhou, Aiguo
Format: Article
Language:English
Subjects:
Anisotropy
Chemical properties
Compacts
Doping
Europium
Europium compounds
Evaluation
Grain growth
Grain size
heat capacity
Hot pressing
Hydrogen
Lattice parameters
Magnetic anisotropy
Magnetic fields
Magnetic properties
Magnetic saturation
Magnetism
magnetization
magnetocaloric effect
Mechanical properties
Nanoparticles
Phase transitions
Physical properties
Plasma sintering
polycrystalline EuS
Saturation
Semiconductor doping
Sintering
Sintering (powder metallurgy)
Temperature
Ytterbium
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Summary:For this work, europium monosulfide (EuS) powders were prepared by sulfurizing Eu2O3 powder with CS2 gas. The synthesized EuS powders were sintered by SPS at temperatures in the 800–1600 °C range for 0.33–1 h at 50 MPa under vacuum conditions. The influences of Yb doping and sintering conditions on the magnetocaloric and mechanical properties of EuS were investigated systematically. An increase in sintering temperature caused the rise of lattice parameters of EuS, whereas Yb doping caused them to drop. SEM showed that the grain size of the EuS increased with sintering temperatures in the 1000–1400 °C range. Higher sintering temperatures can enlarge the magnetizability and saturation magnetization of EuS compact. On the contrary, Yb doping can weaken the magnetizability and saturation magnetization of EuS compact. All sintered polycrystalline EuS compacts had weaker thermomagnetic irreversibility and lower magnetic anisotropy.
ISSN:1420-3049
1420-3049
DOI:10.3390/molecules27175660