Crystal Growth of $RE_{1-x}Ca_xMnO_3$(RE=La, Nd) by Floating Zone Method

부유대역용융법에 의한 $RE_{1-x}Ca_xMnO_3$ (RE=La, Nd)의 결정성장

  • 정준기 (경상대학교 생산기술연구소) ;
  • 조남희 (인하대학교 재료공학부) ;
  • 김철진 (경상대학교 생산기술연구소) ;
  • 이태근 (서울산업대학교 재료공학과)
  • Published : 2000.12.01

Abstract

CMR Materials RE/sub 1-x/Ca/sub x/MnO₃(RE=La, Nd, A=Ca, Sr) were grown using the floating zone image furnace with halogen lamps as heat source. The growth condition was at 2∼10 mm/hr growth rate in air atmosphere, were 445∼50 rpm and 20∼25 rpm of rotation rate of feedrod and growing crystal, respectively. The grown crystals showed shiny black color and annealed at 1500℃ in a box furnace to release the residual stress during cooling. Characterization analyses of the crystal were carried out using XRD and SEM. The crystal structure of Nd/sub 0.7/Ca/sub 0.3/MnO₃ was analyzed with smart CCD XRD was lattice parameter of a=5.425(4)Å, b=5.434(4)Å, and c=7.712(5)Å, an orthorombic system with space group of pbnm.

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