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- Title
Role of nickel doping on magnetocaloric properties of La0.7Sr0.3Mn1−xNixO3 manganites.
- Authors
Kılıç Çetin, Selda; Akça, Gönül; Aslan, Mehmet Selim; Ekicibil, Ahmet
- Abstract
This study reports the effect of Ni substitution for Mn on structural, magnetic, and magnetocaloric properties of La0.7Sr0.3MnO3 manganite synthesized by sol–gel technique. The structural, morphological, and magnetic properties are investigated using x-ray diffractometer (XRD), scanning electron microscope (SEM), and vibrating sample magnetometer (VSM) systems. XRD results showed that all samples crystallize in rhombohedral structure. Thermomagnetic measurements showed that TC decreases with the addition of Ni from 363 K for x = 0.00 to 324 K for x = 0.06. ΔSM determined by Maxwell's relations and Landau theory gave compatible results in the transition temperature and region above. ΔSMmax values were determined as 4.52, 4.51, 4.41, and 3.90 J kg−1 K−1 for x = 0.00, 0.02, 0.04, and 0.06 at 5T, respectively. The Arrott plots and the scaling analysis of ΔSM, which collapsed on a single curve, showed that magnetic transitions are of second order.
- Subjects
MAGNETOCALORIC effects; LANDAU theory; MAGNETIC transitions; SCANNING electron microscopes; TRANSITION temperature; SOL-gel processes; CALORIC content of foods
- Publication
Journal of Materials Science: Materials in Electronics, 2021, Vol 32, Issue 8, p10458
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-021-05702-2