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      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

       
  • Bulletin of Materials Science | News

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