First-order spin-paramagnetic transition and tricritical point in ultrathin Be films

Document Type

Article

Publication Date

1-1-1998

Abstract

We report measurements of the parallel critical magnetic field of thin superconducting beryllium films with (Formula presented) The critical field transitions were spin-paramagnetically limited and found to be strongly hysteretic below a tricritical point at (Formula presented) The magnitude of the hysteresis and (Formula presented) were observed to be completely suppressed in field misalignments (Formula presented) Time relaxation measurements in the hysteretic regime showed simple exponential decays in the highest quality films and nonexponential decays interspersed with avalanches in more inhomogeneous samples. © 1998 The American Physical Society.

Publication Source (Journal or Book title)

Physical Review B Condensed Matter and Materials Physics

First Page

R2952

Last Page

R2955

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