Vortex Dynamics and Instabilities in Layered and Homogeneous Ta/Ge Superconductors

B. J. Ruck; J. C. Abele; H. J. Trodahl; S. A. Brown; P. Lynam

doi:10.1103/PhysRevLett.78.3378

← Back to search

Vortex Dynamics and Instabilities in Layered and Homogeneous Ta/Ge Superconductors

B. J. Ruck, J. C. Abele, H. J. Trodahl, S. A. Brown, P. Lynam

DOI 10.1103/PhysRevLett.78.3378 · Physical Review Letters

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

We present measurements of a dynamically induced instability in the vortex state of an amorphous multilayer and a single alloy layer of Ta/Ge. The critical vortex velocity shows quantitative agreement with the predictions of Larkin and Ovchinnikov calculated using parameters determined independently from the normal state resistivity data. Both samples show a weak field dependence in the critical velocity implying a velocity dependent pinning force in the vortex solid state and a broadening of the transition resulting from the velocity distribution in the liquid state.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
TaGe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	2.7	Pressure not reported	unknown
TaGe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1.7	Pressure not reported	unknown