Magnetic field induced phase transitions in YBa2Cu4O8
Physikinstitut, Universität Zürich,
Winterthurerstrasse 190, 8057 Zürich, Switzerland
Revised: 3 February 1999
Published online: 15 April 1999
The c-axis resistivity measurements in from Hussey et al. for magnetic field orientations along the c-axis as well as within the ab-plane are analyzed and interpreted using the scaling theory for static and dynamic classical critical phenomena. We identify a superconductor to normal conductor transition for both field orientations as well as a normal conductor to insulator transition at a critical field with dynamical critical exponent z=1, leading to a multicritical point where superconducting, normal conducting and insulating phases coexist.
PACS: 74.25.Dw – Superconductivity phase diagrams / 74.25.Fy – Transport properties (electric and thermal conductivity, thermoelectric effects, etc.)
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1999