Abstract
The high-field magnetoresistance of well-characterized LnBa 2 Cu 3 O y (Ln=Ho, Dy, Eu and Y) single crystals has been measured from 4.2 K to 300 K under a pulsed magnetic field up to 60 T. The upper critical field H c2 is well sketched by the usual anisotropic BCS model and the normal resistivity down to liquid helium temperature shows that the system can be regarded as normal metal with positive magnetoresistance. The residual resistivity is between 10 and 50 µΩ cm, reflecting a highly qualified sample preparation. The relations among upper critical field, coherence length and normal resistivity are discussed. It is concluded that the magnetic rare-earth ions Ho and Dy enhance H c2 without affecting T c .
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
