Structural, electrical and magnetic properties of Nd - A - CoO(3) (A = Sr, Ca) Perovskite Powders by Mechanical Alloying.
Structural, electrical and magnetic properties of Nd - A - CoO(3) (A = Sr, Ca) Perovskite Powders by Mechanical Alloying.
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DOI：
10.1038/s41598-018-31458-7
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发表时间：
2018-08-30
影响因子：
4.6
通讯作者：
Uludag FS
中科院分区：
文献类型：
--
作者：
Kursun C;Gogebakan M;Uludag E;Bozgeyik MS;Uludag FS
本文采用机械合金化法合成了NdCoO 3（NCO）、Nd0.8Sr0.2CoO3（NSCO）和Nd0.9Ca0.1CoO3（NCCO）钙钛矿型钴酸盐。通过X射线衍射（XRD）、扫描电子显微镜-能量色散X射线检测（SEM-EDX）、透射电子显微镜（TEM）、差示扫描量热仪（DSC）、振动样品磁强计（VSM）和阻抗分析仪（IA）系统地研究了这些钙钛矿的结构演变、磁性和电学性质。XRD和SEM分析结果表明，机械合金化过程中钙钛矿材料的微观结构发生了变化。通过德拜-谢勒方程计算了钙钛矿材料的平均晶粒尺寸，并通过TEM证实，其被确定为约19 nm。从VSM结果来看，所有的钙钛矿都具有软铁磁性质。IA测量表明，钙钛矿的相对介电常数随频率的增加而降低。因此，第一次，纳米结构的NCO，NSCO和NCCO钙钛矿表现出良好的性能，在只有两个步骤，即研磨和加热。
In this work, NdCoO3 (NCO), Nd0.8Sr0.2CoO3 (NSCO) and Nd0.9Ca0.1CoO3 (NCCO) perovskite cobaltites were synthesised by mechanical alloying method. Structural evolutions, magnetic and electrical properties of these perovskite were systematically examined through X-ray diffraction (XRD), scanning electron microscopy with energy-dispersive X-ray detection (SEM-EDX), transmission electron microscopy (TEM), differential scanning calorimetry (DSC), vibration sample magnetometer (VSM) and impedance analyser (IA). The XRD and SEM results revealed that the microstructure of the perovskite materials changed during mechanical alloying. The average crystallite size of the perovskite materials was calculated by Debye Scherrer equation and was confirmed by TEM, and it was determined ~19 nm. From the VSM results, the all perovskites had soft ferromagnetic properties. IA measurements showed that relatively dielectric constants of the perovskites decreased with increasing frequency. Therefore, for the first time, nanostructured NCO, NSCO and NCCO perovskites exhibiting good properties were produced in only two steps which are milling and heating.
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影响因子：
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