1 / 1

Electronic and Structural transition in La 0.2 Sr 0.8 MnO 3

Electronic and Structural transition in La 0.2 Sr 0.8 MnO 3. R. Bindu 1 , Kalobaran Maiti 1 , R. Rawat 2 and S. Khalid 3 1 Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai, India; 2 UGC-DAE

tamah
Download Presentation

Electronic and Structural transition in La 0.2 Sr 0.8 MnO 3

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Electronic and Structural transition in La0.2Sr0.8MnO3 R. Bindu1, Kalobaran Maiti1, R. Rawat2 and S. Khalid3 1Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai, India; 2UGC-DAE Consortium for Scientific Research, University Campus, Khandwa Road, India; 3National Synchrotron Light Source, Brookhaven National Laboratory, Upton, New York • Cubic at room temperature • Metal to Insulator transition at ~ 265 K • Paramagnetic to C-type antiferromagnetic • structure at ~265 K • Structural transition (controversial) As the above properties have strong link with the behavior of the MnO6octahedra, temperature dependent Mn K-edge EXAFS studies were carried out. The experiments were done on X-18 B beamline at NSLS, BNL. The EXAFS analysis was carried out using UWXAS software. (a) Resistivity during warming ρw(red) and cooling ρc (black) cycles , and (b) Temperature dependent specific heat (Cp) (c) Normalized resistivity (line) and difference between short (R1) and long (R2) Mn-O bond distances (symbols). The EXAFS results reveal distortion in the MnO6 octahedra even in the cubic phase and undergoes unusual evolution across the region of phase transition (~265 K). These behaviors suggest the influence of the fluctuation in the Mn 3d orbital occupancy on their electronic properties which may help in understanding the different kinds of ordering proposed in this system. Temperature behavior of Mn-O bond lengths R. Bindu, Kalobaran Maiti, R.Rawat and S. Khalid, “Electronic and structural transition in La0.2Sr0.8MnO3," Appl. Phys. Lett., 92, 121906 (2008). Work performed on beamline X-18.

More Related