首页|Large magnetocaloric effect and magnetic properties of EuRhO3

Large magnetocaloric effect and magnetic properties of EuRhO3

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We report on the structural,magnetic,and magnetocaloric properties of EuRhO3 powders.The oxidation states of Eu and Rh ions were studied using X-ray photoelectron spectroscopy(XPS).It is found that the Eu ions are mainly in the divalent oxidation state while the Rh ions have+4 state.EuRhO3 powders are found to be antiferromagnetic with a second order magnetic transition at Néel temperature(TN=2.9 K).Analysis of the magnetic susceptibility versus temperature data in terms of the Curie-Weiss law:(x=C/(T-θw))for T＞TN,yields θw=-3.1 K and effective magnetic moment μeff exp=7.72 μB,which is close to the theoretical value μeff theo=7.94 μB.The magnetic entropy change(-△SM),was determined by employing the thermodynamic Maxwell's relation.At μ0H=5 T and near TN,(-△SMMax)and relative cooling power(RCP)exhibit large values of 33.7 J/(kg-K)and 238 J/kg,respectively.The large magnitude of-△SM and RCP show that the EuRhO3 compound could be a potential candidate to be used in cryogenic magnetic refrigeration.

X-ray photoelectron spectroscopyCryogenic magnetic refrigerationMagnetic propertiesMagnetocaloric effectRare earths

M.Lassri、M.Sajieddine、A.Elouafi、A.El Hachmi、S.El Ouahbi、R.Moubah

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Laboratory of Energy and Materials Engineering(LGEM),University of Sultan Moulay Slimane,Faculty of Science and Technology(FST),BP 523,23000,Béni-Mellal,Morocco

Institute of Applied Physics(IAP)-School of Industrial Management(EMINES),Mohammed Ⅵ Polytechnic University,Hay Moulay Rachid,Lot 660,3150,Ben Guerir,Morocco

National School of Applied Sciences(ENSA),University of Sultan Moulay Slimane,BP 77,25000,Khouribga,Morocco

Laboratory of Mechanics,Production and Industrial Engineering(LMPGI),Higher School of Technology of Casablanca(ESTC),University of Hassan Ⅱ Casablanca,Casablanca,Morocco

Laboratory of Radiation on Matter and Instrumentation(LRMI),Faculty of Science and Technology(FST)Settat,Hassan Ⅰ University,Settat,Morocco

Laboatory of Physics of Advanced Materials and Thermic(LPMAT),Faculty of Science Ain Chock(FSAC),University of Hassan Ⅱ Casablanca,Casablanca,Morocco

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2024

10.1016/j.jre.2023.09.009

稀土学报(英文版)
中国稀土学会

稀土学报(英文版)

CSTPCDEI
影响因子：1.3
ISSN：1002-0721
年,卷(期)：2024.42(9)