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HARSH BHATT
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Volume 42 Issue 6 December 2019 Article ID 0267
HARSH BHATT YOGESH KUMAR C L PRAJAPAT M K THOTA SURENDRA SINGH
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.
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Bulletin of Materials Science
Volume 43, 2020
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Dr Shanti Swarup Bhatnagar for Science and Technology
Posted on October 12, 2020Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
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