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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/035/02/0253-0258

    • Keywords

       

      Ion irradiation; amorphization; defects; Sr-hexaferrite crystal; X-ray diffraction; topography.

    • Abstract

       

      High-resolution X-ray diffraction technique, employing a three-crystal monochromator–collimator combination is used to study the irradiation induced defects in flux grown Sr-hexaferrite crystals irradiated with 50 MeV Li3+ ion beams at room temperature with a fluence value of 1 × 1014 ions/cm2. The diffraction curves of the irradiated crystals suggest the possibility of creation of low angle grain boundaries and other point/clusters of defects causing amorphization in the irradiated crystals. The perfection of the irradiated and unirradiated (0001) cleaved surfaces of the crystals is studied using the bulk method of X-ray topography. The topographs supplement the findings suggestive of modifications in the crystalline quality of SrFe12O19 on irradiation with SHI of Li3+. Etching of the (0001) cleaved surfaces in H3PO4 at 120°C suggests that the dissolution characteristics of the surfaces get affected on irradiation with SHI of Li3+, besides supporting the findings of HRXRD and X-ray topography regarding modifications in the perfection of SrFe12O19 on irradiation.

    • Author Affiliations

       

      Balwinder Kaur1 Monita Bhat1 F Licci2 Ravi Kumar3 K K Bamzai1 P N Kotru1

      1. Department of Physics and Electronics, University of Jammu, Jammu 180 006, India
      2. Instituto MASPEC – CNR, Via Chiavari 18/A, 43100 Parma, Italy
      3. Nuclear Science Centre, New Delhi 110 067, India

    • Dates

       
      Published
      April 2012
      Manuscript received
      19 March 2011

  • Bulletin of Materials Science | News

    • Dr Shanti Swarup Bhatnagar for Science and Technology

      Posted on October 12, 2020

      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
      Chemical Sciences 2020

      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
      Physical Sciences 2020

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      Posted on July 25, 2019

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