Article (Scientific journals)
Magnetocaloric effect and electrical properties of (0.95)La0.45Nd0.25Sr0.3MnO3/ (0.05)CuO composites.
fkhar, Lahcen; maalam, Khadija El; Hamedoun, Mohammed et al.
2020In Materials Research Express
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Keywords :
Magnetocaloric Effect; Perovskite Manganite; Magnetic entropy change; electrical properties
Abstract :
[en] In this work, the structural, magnetic and magnetocaloric properties of 0.95La0.45Nd0.25Sr0.3MnO3/0.05CuO composites materials were investigated. The samples have been synthesized by solid-state reaction route. The XRD patterns of composites powders show the presence of both perovskite La0.45Nd0.25Sr0.3MnO3 and monoclinic Tenorite CuO materials. The microstructural characterization performed using Scanning Electron Microscope shows that copper oxide nanostructure is located in the grains boundaries after pressing. According to the isothermal magnetization measurements around the Curie temperature, the maximum isothermal magnetic entropy change is calculated to be 4.128 J/(Kg.K) at 5T for the pellet with an interesting enhancement compared to the powder sample 2.7 J/(Kg.K). The relative cooling power is about 212.8 J/Kg. Resistivity measurements under different magnetic fields were performed in order to investigate the magnetoresistance properties. The obtained magnetocaloric properties show that 0.95La0.45Nd0.25Sr0.3MnO3/0.05CuO composite was an attractive candidate material for magnetic refrigeration application. About magnetoresistance properties the (% MR) was found to be 32.78 % around 320 K under a magnetic field of 5 T.
Disciplines :
Physics
Author, co-author :
fkhar, Lahcen
maalam, Khadija El
Hamedoun, Mohammed
Kenz, Abdallah El
Benyoussef, Abdelilah
lachkar, Pierre
Hlil, E. Khalil
Mahmoud, Abdelfattah  ;  Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT
Boschini, Frédéric ;  Université de Liège - ULiège > Plateforme APTIS
Ali, Mustapha Ait
Mounkachi, Omar
Language :
English
Title :
Magnetocaloric effect and electrical properties of (0.95)La0.45Nd0.25Sr0.3MnO3/ (0.05)CuO composites.
Publication date :
12 June 2020
Journal title :
Materials Research Express
eISSN :
2053-1591
Publisher :
IOP Publishing, Bristol, United Kingdom
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 18 June 2020

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