Research basic magnetism of Pr2Sr2PrCu3O8,TbSr2Mo0.3Cu2.7O7,( Pr0.5Nd0.5)Ba2Cu3O7 using ac-susceptibility

• Main Authors: Horng, Chi Yang, 洪啟洋
• Other Authors: Kuan Ching Lee, Wen Hsien Li
• Format: Others
• Language: zh-TW
• Published: 1998
• Online Access: http://ndltd.ncl.edu.tw/handle/45100359151518145968

碩士 === 國立中央大學 === 物理學系 === 86 === The ac susceptibility of high-Tc compound Pb2213 and Tb1237 can be nicelydescribed by Curie-Weiss law in the high temperature range. The Curie temperature and effective moment can be extracted from fitting the experimentaldata. As temperature lowering,the curve depart from the Curie-weiss curve andnegative values are observed. The diamagnetic response observed in the in-phasecomponent signifies the occurrence of superconductivity. The portion of superconductivity increases and paramagnetism decreases as temperature decreasing. Below the lower temperature the superconductivity and magneticorder coexist. A fixed term G was used in fitting the cups cueve, which isthe feature of antiferromagnetism.