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Effect of sintering temperature under high pressure in the uperconductivity for MgB2

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arxiv cond-mat/0102383 v1 pith:3ZT3J2DY submitted 2001-02-21 cond-mat.supr-con

C. U. Jung , Min-Seok Park , W. N. Kang , Mun-Seog Kim , Kijoon H. P. Kim , S. Y. Lee , Sung-Ik Lee This is my paper
classification cond-mat.supr-con
keywords highpressuremgb2propertiessinteringsuperconductingtemperatureunder
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We report the effect of the sintering temperature on the superconductivity of MgB2 pellets prepared under a high pressure of 3 GPa. The superconducting properties of the non-heated MgB2 in this high pressure were poor. However, as the sintering temperature increased, the superconducting properties were vastly enhanced, which was shown by the narrow transition width for the resistivity and the low-field magnetizations. This shows that heat treatment under high pressure is essential to improve superconducting properties. These changes were found to be closely related to changes in the surface morphology observed using scanning electron microscopy.

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