Abstract
In ErNi2B2C a microscopic and stable coexistence of ferromagnetism and superconductivity has been confirmed. In order to explore a possibility of the spontaneous vortex state, we performed small angle neutron scattering experiments. The results show that, in a field cooled process, an effective field evaluated by the vortex distance (scattering pattern) shows a clear increase as the system enters the weak ferromagnetic phase. This provides a direct evidence that an internal magnetic field mediated by the weak ferromagnetic order creates new vortices and affects the flux line lattice structure.
Original language | English |
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Pages (from-to) | S716-S718 |
Journal | Physica C: Superconductivity and its Applications |
Volume | 470 |
Issue number | SUPPL.1 |
DOIs | |
State | Published - Dec 2010 |
Funding
The Research at Oak Ridge National Laboratory’s High Flux Isotope Reactor was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, US Department of Energy . H.K.-F. was partially supported by the US - Japan Cooperative Research Program on Neutron Scattering between the US DOE and Japanese MEXT.
Keywords
- Ferromagnetic superconductor
- Rare-earth nickel borocarbide
- Small angle neutron scattering
- Spontaneous vortex