NMR Studies of Magnetic Vortex Cores of Type-II Superconductors

Research Project

Project/Area Number	22540353
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Single-year Grants
Section	一般
Research Field	Condensed matter physics II
Research Institution	Kyoto Sangyo University (2011-2012) National Institute for Materials Science (2010)
Principal Investigator	ITOH Yutaka 京都産業大学, 理学部, 准教授 (50378543)
Project Period (FY)	2010 – 2012
Project Status	Completed (Fiscal Year 2012)
Budget Amount *help	¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000) Fiscal Year 2012: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000) Fiscal Year 2011: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000) Fiscal Year 2010: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Keywords	磁気共鳴 / 超伝導 / 磁束物理 / 渦糸芯 / 核磁気共鳴 / 磁束相 / 渦糸芯状態
Research Abstract	We have developed site-selective NMR techniques from the viewpoints of In-situ and Ex-situ NMR to study the local magnetism of quantum interference bound states inside vortex cores in the mixed states of type II superconductors.We found the inhomogeneous magnetic correlation of Ca_2-xNa_xCuO_2Cl_2, a magnetic differentiation phenomenon at the superconducting transition for Hg1223, and frequency distribution of spin correlation in the broad NQR spectrum of Bi2212 below T_c.