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    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/042/06/0267

    • Keywords

       

      Phase co-existence; PLD; charge ordering; ferromagnetism; SEM.

    • Abstract

       

      We present a comparative study on phase co-existence in La$_{1/4}$Pr$_{3/8}$Ca$_{3/8}$MnO$_3$ (LPCMO) in a polycrystalline bulk and thin film form. The X-ray diffraction results confirm the formation of single-phase polycrystalline bulk and c-axisoriented strained epitaxial thin films on a LaAlO$_3$ substrate. Scanning electron microscopy images show a homogeneous microstructure growth for both the bulk as well as thin film samples. The temperature dependent magnetization curves for bulk and thin film show remarkably different features indicating the presence of very different phase separation scenarios.A two-step rise and a large thermal hysteresis are observed between zero-field cooled and field-cooled magnetization plots in the bulk sample. However, the magnetization of the film shows a very small hysteresis and a negligible signature of the CO-AFM state for the same composition. The field dependent magnetization plots indicate that in a bulk form LPCMO is a soft magnet and shows a metamagnetic behaviour while in a thin film form it acts as a hard magnet and the metamagnetic behaviour is completely lost.

    • Author Affiliations

       

      HARSH BHATT1 2 YOGESH KUMAR1 C L PRAJAPAT3 M K THOTA4 SURENDRA SINGH1 2

      1. Solid State Physics Division, Bhabha Atomic Research Centre, Trombay 400085, India
      2. Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India
      3. Technical Physics Division, Bhabha Atomic Research Centre, Trombay 400085, India
      4. Mechanical Metallurgy Division, Bhabha Atomic Research Centre, Trombay 400085, India

    • Dates

       
      Published
      1 December 2019
      Manuscript received
      30 October 2018
      Accepted
      14 February 2019
      Final version published online
      11 September 2019

  • 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

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

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