Projects per year
We report on small-angle neutron scattering (SANS) measurements of the vortex lattice (VL) in twin-free YBa2Cu3O7, extending the previously investigated maximum magnetic field of <11 T up to 16.7 T with the field applied parallel to the c axis. This is a microscopic study of vortex matter in this region of the superconducting phase. We find that the high magnetic field VL displays a rhombic structure, with a field-dependent coordination that passes through a square configuration with no lock-in to a field-independent structure. The VL pinning reduces with increasing temperature but is seen to affect the VL correlation length even above the irreversibility temperature of the lattice structure. At high field and temperature we observe a VL melting transition, which appears to be first order. The vortex liquid phase above the transition does not give a detectable SANS signal. © 2014 American Physical Society.
ASJC Scopus subject areas
- Condensed Matter Physics
- Electronic, Optical and Magnetic Materials
FingerprintDive into the research topics of 'High magnetic field studies of the vortex lattice structure in YBa2 Cu3 O7'. Together they form a unique fingerprint.
- 2 Finished
Blackburn, E. & Forgan, T.
1/07/12 → 31/12/15
Forgan, T. & Blackburn, E.
1/04/09 → 30/09/12
Project: Research Councils
Elizabeth Blackburn (Keynote speaker)30 May 2016 → 31 May 2016
Activity: Academic and Industrial events › Conference, workshop or symposium
Elizabeth Blackburn (Invited speaker)29 Oct 2014 → 30 Oct 2014
Activity: Academic and Industrial events › Industry event