Study of The Crystal Structure and Magnetic Properties of Ru-based Double Perovskite Single Crystal Sr2-xPbxYRuO6

• Main Author: 莫文皓
• Other Authors: 林滄浪
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/9a58g7

碩士 === 國立清華大學 === 工程與系統科學系 === 92 === In this thesis, we have grown the Sr2-xPbxYRuO6 single crystal by using flux growth technique. Systematic studies on the physical properties of the crystals were performed, including X-ray diffraction, sample characterization and magnetic measurement. According to the characterization analysis, the copper ion was not doped into the crystal which was suggested being partial doped to the ruthenium site and thus resulted in a superconductivity behavior. On the other hand, the Lead ion, which was come from the flux, may substitute into the lattice, and form a second phase which was indicated to be the SrRu1-xPbxO3 phase. The magnetic susceptibility data suggest that the crystal show ferromagnetic ordering at 140 K and antiferromagnetic ordering below 31 K. The susceptibility data which was measuring at high field indicated that the main phase of the compound is antiferromagnetic, and the ferromagnetic behavior is related to the SrRu1-xPbxO3 phase.