Title

Scaling of thin-film Nd1.85Ce0.15CuO4-y resistivity-current isotherms at low fields: Implications for vortex phase transitions and universality

Authors

Brandon R. Brown, University of San FranciscoFollow

Document Type

Article

Publication Date

6-1-1995

Abstract

We have investigated a second-order phase transition of the vortex lattice in thin-film Nd_1.85Ce_0.15CuO_4-y from 1 mT to 1 T applied magnetic fields. The dc resistivity-current density data for each field exhibit critical scaling consistent with a second-order vortex-liquid to vortex-solid phase transition. The high-field data support the vortex-glass model and have the same critical exponents as thin-film YBa₂Cu₃O_7-δ. At low fields we observe a change in the critical exponents and universal functions. The critical regime diminishes as the field is decreased but remains nonzero even at 1 mT. These results suggest that the universality class of the transition changes at low fields.

Comments

Article published in Physical Review B, 51, pp 15281-15285 (1995).

© 1995 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevB.51.15281

DOI: 10.1103/PhysRevB.51.15281

Recommended Citation

Brown, Brandon R., "Scaling of thin-film Nd1.85Ce0.15CuO4-y resistivity-current isotherms at low fields: Implications for vortex phase transitions and universality" (1995). Physics and Astronomy. 23.
https://repository.usfca.edu/phys/23