Structural and magnetic properties of Y-doped La 0.5 Sr 0.5 MnO 3 manganite system: Evidence of step-like magnetization

Subhrangsu Taran, C. P. Sun, C. L. Huang, H. D. Yang, A. K. Nigam, B. K. Chaudhuri, S. Chatterjee

研究成果: Conference contribution

1 引文 斯高帕斯(Scopus)

摘要

The magnetic and transport properties of bulk doped manganite, La 0.5-y Y y Sr 0.5 MnO 3 have been studied as a function of yttrium doping, y, for 0 ≤ y ≤ 0.25. In the absence of the yttrium this is a well studied half-doped manganite which is a metallic ferromagnet. The end members of this system (with y = 0 and 0.25) are found to be structurally different (rhombohedral and orthorhombic, respectively) due to the large distortions caused by the yttrium. These distortions make this series of compounds particularly interesting. The magnetization obtained in zero field cooled (ZFC) and field cooled (FC) studies show dramatic changes as the value of y is raised above 0.05. The magnetic behavior is further investigated by a study of the hysteresis loops, frequency dependent susceptibility and studies of the magnetic relaxation. The results are understood in terms of the average size of the cation on the A site, <r A >, and the variance, σ 2 (= ?y i 2 r i 2 - <r A > 2 ). The value of the variance, σ 2 , increases rapidly with doping, y, induces melting of the long range ferromagnetic ordering, exhibiting a stepwise variation of magnetization (metamagnetic like). Based on the present results a magnetic phase diagram has been drawn demonstrating different magnetic phase sequences with the variation of σ 2 .

原文English
主出版物標題Solid State Physics
主出版物子標題Proceedings of the 59th DAE Solid State Physics Symposium 2014
編輯R. Chitra, N. K. Sahoo, Dibyendu Bhattacharyya
發行者American Institute of Physics Inc.
ISBN(電子)9780735413108
DOIs
出版狀態Published - 2015 六月 24
事件59th DAE Solid State Physics Symposium, SSPS 2014 - Vellore, Tamilnadu, India
持續時間: 2014 十二月 162014 十二月 20

出版系列

名字AIP Conference Proceedings
1665
ISSN(列印)0094-243X
ISSN(電子)1551-7616

Conference

Conference59th DAE Solid State Physics Symposium, SSPS 2014
國家/地區India
城市Vellore, Tamilnadu
期間14-12-1614-12-20

All Science Journal Classification (ASJC) codes

  • 物理與天文學 (全部)

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