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采用粉末熔化法(PMP)制备了Y<sub>1-r</sub>Ho<sub>r</sub>Ba<sub>2</sub>Cu<sub>3</sub>O<sub>7-δ</sub>(x=0,0.2,0.4,0.6,1)和Y<sub>1-x</sub>Gd<sub>x</sub>Ba<sub>2</sub>Cu<sub