Coherence effects in S/I/N/I/FS tunnel junctions

• 来源期刊: 中国物理B（英文版）
• 关键词: ferromagnetic superconductor Josephson current current oscillation
• 年，卷（期）: 2007,（11）
• 页码范围: 3514-3519
• 页数: 6页
• 语种: 英文

摘要

The dc Josephson effect in superconductor/insulator/normal metal/insulator/ferromagnetic superconductor junctions has been studied. We calculate the dc Josephson current based on the Bogoliubov de Gennes equation. The Josephson current is derived as a function of exchange field in ferromagnetic superconductor, normal metal thickness and insulating barrier strength. It is found that there exists an oscillation relation between the critical Josephson current and the normal metal thickness. The oscillation amplitude decreases as the thickness of the normal metal increases or the exchange field augments.