Structural, magnetic and field-driven abrupt magnetocaloric properties of La1.4-xSmxCa1.6Mn2O7 Ruddlesden-Popper manganites

被引：13
|
作者：
Kumar, Akshay [1 ]
Kumari, Kavita [2 ]
Vij, Ankush [3 ]
Kumar, Shalendra [3 ,4 ]
Shin, Minji [1 ]
Koo, Bon Heun [1 ,2 ]
机构：
[1] Changwon Natl Univ, Dept Mat Convergence & Syst Engn, Chang Won 51140, Gyeongnam, South Korea
[2] Changwon Natl Univ, Sch Mat Sci & Engn, Chang Won 51140, Gyeongnam, South Korea
[3] Univ Petr & Energy Studies, Dept Phys, Dehra Dun 248007, Uttarakhand, India
[4] King Faisal Univ, Coll Sci, Dept Phys, Al Hufuf 31982, Al Ahsa, Saudi Arabia
来源：
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2021年 / 41卷 / 14期
基金：
新加坡国家研究基金会;
关键词：
Magnetocaloric; Ruddlesden-Popper manganites; Solid-state reaction method; Heat capacity; Isothermal entropy change; ADIABATIC TEMPERATURE-CHANGE; ELECTRONIC-PROPERTIES; HEAT-CAPACITY; ENTROPY; SPIN; TRANSITION; BEHAVIOR; OXIDES; SHAPE; LA;
D O I：
10.1016/j.jeurceramsoc.2021.07.033
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Evolution in the structural, magnetic and magnetocaloric (MCE) properties for a series of samarium (Sm) doped La1.4-xSmxCa1.6Mn2O7 (0.0 <= x <= 0.4) Ruddlesden-Popper manganites prepared by using the solid-state reaction method have been investigated. Structural refinement of XRD profiles established that the MnO6 octahedral structural units were distorted upon Sm-substitution. The effect of Sm-concentration on the microstructure was also very well observed in terms of increased average grain size and absolute density. Discrepancy in MCE parameters by implementing the conventional isothermal curve method was appeared which was resolved with a separate calorimetric method. The isothermal entropy change was enhanced from 2.52 J/kgK for x = 0.0 sample up to 4.61 J/kgK and 4.2 J/kgK for x = 0.1 and x = 0.2 samples respectively. The temperature averaged entropy change (TEC) was also remarkably improved from 4.04 J/kgK up to 8.5 J/kgK and 7.77 J/kgK for the same compounds respectively.
引用
收藏
页码：7050 / 7061
页数：12
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