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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)


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 .

Original languageEnglish
Title of host publicationSolid State Physics
Subtitle of host publicationProceedings of the 59th DAE Solid State Physics Symposium 2014
EditorsR. Chitra, N. K. Sahoo, Dibyendu Bhattacharyya
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735413108
Publication statusPublished - 2015 Jun 24
Event59th DAE Solid State Physics Symposium, SSPS 2014 - Vellore, Tamilnadu, India
Duration: 2014 Dec 162014 Dec 20

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Conference59th DAE Solid State Physics Symposium, SSPS 2014
CityVellore, Tamilnadu

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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