• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

2008 Fiscal Year Final Research Report

Time-resolved spectroscopic study of exotic multiferroic oxides

Research Project

  • PDF
Project/Area Number 19840026
Research Category

Grant-in-Aid for Young Scientists (Start-up)

Allocation TypeSingle-year Grants
Research Field Condensed matter physics I
Research InstitutionKyoto University

Principal Investigator

K・R MAVANI  Kyoto University, 物質-細胞統合システム拠点, 特定研究員(WPI) (10452260)

Project Period (FY) 2007 – 2008
Keywords強相関電子系 / マルチフェロイック / テラヘルツ分光 / ラマン分光
Research Abstract

We synthesized different exotic oxide thin film and polycrystalline pellets. We observed electromagnons in CoCr_2O_4 thin film using terahertz time-domain spectroscopy, which is the first such observation for spinel multiferroic. Raman spectroscopy shows transit phonon mode on CoCr_2O_4. Photoinduced effect has been observed in a manganite thin film using visible pump terahertz probe spectroscopy.

  • Research Products

    (7 results)

All 2009 2008

All Journal Article (1 results) Presentation (6 results)

  • [Journal Article] Effects of disorder and scaling of optical conductivity in Nd_<0.5>Ca_<0.5-x>Ba_xMnO_3(x=0 and 0.02) thin films as observed by terahertz time domain spectroscopy2008

    • Author(s)
      K. R. Mavani, M. Nagai, D. S. Rana, H. Yada, I. Kawayama, M. Tonouchi and K. Tanaka
    • Journal Title

      Applied Physics Letters 93

      Pages: 231908

  • [Presentation] Ultra-Fast Photoinduced Effects on the Charge-Dynamics of Pr_<0.5>Sr_<0.5>MnO_3 Manganite2009

    • Author(s)
      K. R. Mavani, D. S. Rana, M. Nagai, M. Tonouchi, K. Tanaka
    • Organizer
      Japanese Physical Society Metting at Rikkyou University
    • Place of Presentation
      Japan
    • Year and Date
      20090327-30
  • [Presentation] Large Magnetodielectric Effect Observed In Multiferroic CoCr2O_4 Thin Film Using Terahertz Time-Domain Spectroscopy2009

    • Author(s)
      K. R. Mavani, M. Nagai, D. S. Rana, M. Tonouchi, K. Tanaka
    • Organizer
      International Workshop on Optical Terahertz Science and Technology, Santa Barbara
    • Place of Presentation
      United States
    • Year and Date
      20090307-11
  • [Presentation] Poster presentation : "Influence of ferromagnetic ordering and relaxation dynamics in CoCr_2O_4 multiferroic thin film as studied by terahertz time-domain spectroscopy2008

    • Author(s)
      K. R. Mavani, M. Nagai, D. S. Rana, M. Tonouchi, K. Tanaka
    • Organizer
      Japanese Physical Society meeting at Iwate University
    • Place of Presentation
      Japan, during
    • Year and Date
      20080920-23
  • [Presentation] Oral Presentation : "Large drop in dielectric constant at ferromagnetic transition in CoCr_2O_4 thin film as studied by terahertz time-domain spectroscopy2008

    • Author(s)
      K. R. Mavani, M. Nagai, D. S. Rana, M. Tonouchi, K. Tanaka
    • Organizer
      The 8^<th> International conference on excitonic processes in condensed matter (EXCON'08) at Kyoto University
    • Place of Presentation
      Japan, during
    • Year and Date
      20080622-27
  • [Presentation] Oral Presentation : "Scaling of optical conductivity and disorder effect in half-doped manganites Nd_<0.5>Ca_<0.5>Mn_O_3 and Nd_<0.5>Ca_<0.48>Ba_<0.02>MnO_3 thin films as probed by Terahertz time-domain spectroscopy2008

    • Author(s)
      K. R. Mavani, M. Nagai, D. S. Rana, H. Yada, I. Kawayama, M. Tonouchi and K. Tanaka
    • Organizer
      American Physical Society meeting (APS, Spring meeting 2008) at New Orleans
    • Place of Presentation
      USA during
    • Year and Date
      20080309-14
  • [Presentation] Poster presentation : "Large drop in dielectric constant at ferromagnetic transition in CoCr_2O_4 thin film as studied by terahertz time-domain spectroscopy2008

    • Author(s)
      K. R. Mavani, M. Nagai, M. Shirai, K. Tanaka, D. S. Rana, I. Kawayama, M. Tonouchi
    • Organizer
      American Physical Society meeting (APS, Spring meeting 2008) at New Orleans
    • Place of Presentation
      USA during
    • Year and Date
      20080309-14

URL: 

Published: 2010-06-10   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi