Influence of Gd Substitution on Structural, Magnetic and Magnetocaloric Properties in (La0.8Gd0.2)0.85Ag0.15MnO3 Perovskite Manganite System
Abstract
In this paper, the effect of Gd substitution with La
on structural, magnetic and magnetocaloric properties in (La0.8Gd0.2)0.85Ag0.15MnO3
manganite sample prepared by sol-gel method has been studied. The crystal properties have been investigated by
x-ray diffraction technique that shows the
sample is in rhombohedral structure with Rc space
group. In addition to this structure, small amount of reflections belongs to
GdMn2O5 phase is detected. Scanning electron microscope
images show that the sample is constituted from square shaped grains. Energy
dispersive x-ray spectroscopy analysis shows that the sample includes all
expected elements. The sample exhibits magnetic phase
transition from ferromagnetic to paramagnetic phase at around 149 K
temperature. Applied field dependence of magnetization under isothermal process
M(H) shows that the nature of the phase transition is second order and
maximum magnetic entropy change (-ΔSM)
value calculated from M(H) curves
is found as 1.73 J/kgK under 50 kOe external magnetic field change.
Keywords
References
- [10] A.J. Millis, P.B. Littlewood and B.I. Shraiman, Physical Review Letters 74 (1995) p. 5144.
- [11] J.B. Goodenough, A. Wold, R.J. Arnott and N. Menyuk, Physical Review 124 (1961) p. 373.
- [12] A. Selmi, R. M'Nassri, W. Cheikhrouhou-Koubaa, N.C. Boudjada and A. Cheikhrouhou, Journal of Alloys and Compounds 619 (2015) p. 627.
- [13] C. Hao, B. Zhao, Y. Huang, G. Kuang and Y. Sun, Journal of Alloys and Compounds 509 (2011) p. 5877.
- [14] R. M’nassri and A. Cheikhrouhou, Journal of Superconductivity and Novel Magnetism 27 (2014) p. 1463.
- [15] R.M. nassri, W. Cheikhrouhou-Koubaa, M. Koubaa and A. Cheikhrouhou, IOP Conference Series: Materials Science and Engineering 28 (2012) p. 012050.
- [16] R. M’nassri, W. Cheikhrouhou-Koubaa, N. Boudjada and A. Cheikhrouhou, Journal of Superconductivity and Novel Magnetism 26 (2013) p. 1429.
- [17] A.O. Ayaş, M. Akyol and A. Ekicibil, (2016).
Details
Primary Language
English
Subjects
-
Journal Section
Research Article
Publication Date
June 29, 2018
Submission Date
February 2, 2018
Acceptance Date
April 30, 2018
Published in Issue
Year 2018 Volume: 39 Number: 2