Investigations on Spintronic RFeO₃ Crystals Grown by Optical Floating Zone Technique

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  • Ramesh BABU. P.
    Department of Electronics and Communication Systems, Sri Krishna Arts and Science College,
  • KALAINATHAN S.
    Centre for Nano technology Research, VIT University,
  • YOSHIMURA Satoru
    Research Center of Advanced Materials for Breakthrough Technology, Graduate School of Engineering Science, Akita University,

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タイトル別名
  • Investigations on Spintronic RFeO<sub>3</sub> Crystals Grown by Optical Floating Zone Technique

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<p>Magnetic crystals are physically important to know their intrinsic magnetic properties. Magnetic crystals are also technologically important and their creation has aided crystal growth significantly. Rareearth orthoferrites material (RFeO3) is one of the major components used in manufacturing sophisticated gadgets. This study focuses on the growth and physical properties of the optically generated RFeO3 (R=Y, Gd and Sm) single crystals. The floating zone method generates single crystals of 3-20 mm/h in the optical zone. The purity of the grown materials was confirmed from the Powder X-Ray Diffraction (PXRD) analysis. The addition of Gd to YFeO3 increases the lattice parameters of the material. Magnetic properties of the grown crystal were studied between 20-700 K. At high temperature, two anomalous effects were observed, one at (TSR=480 K) due to spin reorientation and the other is antiferromagnetic (AFM) to paramagnetic transitions at (TN= 670 K). Bloch parameter was also calculated. Microhardness value decreases nonlinearly. When the applied load is greater than 1.96 N, there is a transition from palmqvist to median crack due to the plastic deformation of the crystal. Controllable magnetic and mechanical characteristics will help to enhance performance of magnetic devices.</p>

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