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      https://www.ias.ac.in/article/fulltext/boms/014/04/1163-1166

    • Keywords

       

      Galvanomagnetic effect; Magneto-resistor; Bi-Sr-Ca-Cu-O films; meander shape; spray pyrolysis; screen-printing; hysteresis

    • Abstract

       

      Galvanomagnetic effect has been studied at 77 K on Bi-Sr-Ca-Cu-O films as a function of d.c. bias current. These films were prepared by spray pyrolysis and screen-printing techniques, withTc (R=0) 80 K and 100 K respectively. Magnetic field dependence ofIc of sprayed-film showed very small hysteresis whereas screen-printed film showed greater hysteresis. Application of small magnetic field on these films destroyed the zero-resistance state and a finite resistance was developed. The slope of the resistance vs magnetic field curveΔR/ΔH depended on the current flowing through the sample. To increaseΔR/ΔH, meander-shape pattern was prepared on the sprayed film. In generalΔR/ΔH increased by a factor of 103 after sample patterning. The possibility of using these films as a sensitive magnetic field sensor is discussed.

    • Author Affiliations

       

      Ramesh Chandra1 Neeraj Khare1 A K Gupta1 D K Walia1 Sangeeta Chaudhry1 V N Ojha1 V S Tomar1

      1. Cryogenics Division, National Physical Laboratory, Dr K S Krishnan Road, New Delhi - 110 012, India
    • Dates

       
  • Bulletin of Materials Science | News

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