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首页> 外文期刊>Physica, C. Superconductivity and its applications >INFLUENCE OF FLUORINE IN MAGNETIC PROPERTIES OF HG-1223 HIGH-TEMPERATURE SUPERCONDUCTORS
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INFLUENCE OF FLUORINE IN MAGNETIC PROPERTIES OF HG-1223 HIGH-TEMPERATURE SUPERCONDUCTORS

机译：氟对HG-1223高温超导体磁性能的影响

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Bulk pure-phase samples of HgBa2Ca2Cu3Oy with high quality were prepared using a solid-state reaction with BaF2 as a part of the starting material. X-ray diffraction data show that the crystal structure is nearly the same as for starting compounds without fluorine with a = 3.85 Angstrom and c = 15.85 Angstrom. The effect of fluorine in the starting material on the magnetic properties was studied by PC susceptibility and hysteresis-loop measurements, and our results revealed a remarkable enhancement of hysteretic magnetization in samples prepared using BaO/BaF2. Fluorine in Hg-1223 also shows an effect similar to that of oxygenation, which increases T-c onset of the as-synthesized samples to 133 K. The asymmetric magnetization-field data indicate the presence of a surface barrier, and the field dependence and time dependence of the magnetization data display an enhancement of hysteresis upon replacement of 10% of BaO by BaF2 as a result of increased concentration of pinning centers without changing the nature of the individual pinning. [References: 17]
机译：使用BaF2作为起始原料的固态反应，制备了高质量的HgBa2Ca2Cu3Oy大块纯相样品。 X射线衍射数据表明，其晶体结构与不含氟的起始化合物的晶体结构几乎相同，a ＝ 3.85埃，c ＝ 15.85埃。通过PC磁化率和磁滞回线测量研究了原料中氟对磁性能的影响，我们的结果表明，使用BaO / BaF2制备的样品中磁滞磁化强度显着提高。 Hg-1223中的氟也显示出与氧合相似的效果，这会使合成后的样品的Tc起始增加到133K。非对称磁化场数据表明存在表面势垒，并且场依赖性和时间依赖性磁化数据的变化显示，由于钉扎中心的浓度增加而没有改变单个钉扎的性质，因此用BaF2代替10％的BaO时磁滞增强。 [参考：17]

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