Effect of Monovalent Cation Doping on Structural, Magnetic, and Magnetocaloric Properties of Pr0.85A0.15MnO3 (A = Ag and K) Manganites

被引：0
作者：
Gönül Akça
Ali Osman Ayaş
Selda Kılıç Çetin
Mustafa Akyol
Ahmet Ekicibil
机构：
[1] Çukurova University,Department of Physics, Faculty of Sciences and Letters
[2] Adıyaman University,Department of Mechatronics Engineering, Faculty of Technology
来源：
Journal of Superconductivity and Novel Magnetism | 2017年 / 30卷
关键词：
Manganites; Magnetic properties; Magnetic entropy change; Magnetocaloric effect;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A systematic study on the effect of monovalent cation doping on structural, magnetic, and magnetocaloric properties of Pr0.85A0.15MnO3 (A = Ag and K) samples synthesized by a sol-gel method has been carried out. The crystal structure and morphology have been worked by X-ray diffraction (XRD) and scanning electron microscopy (SEM) imaging measurements. The XRD results indicate that both samples have orthorhombic structure. Magnetization versus temperature measurements show that our samples display a ferromagnetic-to-paramagnetic phase transition with increasing temperature. The ferromagnetic-to-paramagnetic phase transition temperature (TC) values were found as 74 and 116 K for Pr0.85Ag0.15MnO3 and Pr0.85K0.15MnO3, respectively. The magnetic entropy changes were evaluated from isothermal magnetization curves measured at various temperatures near TC by steps of 4 K. The values of the magnetic entropy change were determined as 0.99 and 1.39 J kg −1 K −1 for Pr0.85Ag0.15MnO3 and Pr0.85K0.15MnO3 under external field changes of 10 kOe, respectively.
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页码：1515 / 1525
页数：10
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