Thermal properties of Pr2/3Sr1/3MnO3 manganites:PdO composites

被引：2

作者：

Rao, Ashok ^{[1
]}

Manjunatha, S. O. ^{[2
]}

Bhatt, Ramesh Chandra ^{[3
]}

Awana, V. P. S. ^{[3
]}

Lin, C. F. ^{[4
]}

Kuo, Y. K. ^{[4
]}

Poornesh, P. ^{[1
]}

机构：

[1] Manipal Univ, Manipal Inst Technol, Dept Phys, Manipal 576104, Karnataka, India

[2] MS Ramaiah Univ Appl Sci, Dept Phys, Bangalore 560058, Karnataka, India

[3] Natl Phys Lab CSIR, Quantum Phenomena & Applicat Div, New Delhi 110012, India

[4] Natl Dong Hwa Univ, Dept Phys, Hualien 97401, Taiwan

来源：

SOLID STATE COMMUNICATIONS | 2017年 / 265卷

关键词：

Manganites; Composites; Specific heat; Entropy; SPONTANEOUS MAGNETIZATION; MAGNETORESISTANCE; LA1-XSRXMNO3; TRANSPORT; FE;

D O I：

10.1016/j.ssc.2017.08.004

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

In the present communication the results on thermal conductivity, Seebeck coefficient and specific heat of Pr-2/3Sr(1/3)MnO(3): PdO composites are reported. All the samples exhibit a pronounced anomaly in thermal conductivity (kappa) at their respective Curie temperatures, T-C of the samples. It is also observed that the overall magnitude of. decreases with increasing Pd content. The observed reduction of the total k(T) is discussed with various thermal scattering mechanisms. The temperature-dependent Seebeck coefficient data S(T) in the high temperature region is analyzed within the framework of Mott's polaron hopping model. The analysis of low-temperature S(T) data reveals that the electron-magnon scattering contribution dominates the thermoelectric transport at low temperatures. The magnetic contribution for the CP and change in entropy (Delta S) during the magnetic phase transition is also evaluated.

引用

页码：37 / 40

页数：4

共 21 条

[1] Structural, electrical and thermal studies of Nb-doped Pr0.7Sr0.3Mn1-xNbxO3(0 ≤ x ≤ 0.05) manganites [J].