Magnetostriction measurements for amorphous wires.

Effect of annealing on torsion giant impedance of Co-rich amorphous wires with vanishing magnetostriction

Torsion giant impedance ~TGI! ratio, (DZ/Z)j , has been measured in as-cast and annealed ~Co0.94Fe0.06)72.5B15Si12.5 amorphous wire. Two-step current annealing has been employed: pre-annealing ~550 mA, 2 min! plus current annealing under torsion stress ~33 p rad/m, 450 mA, up to tann5105 min!. Pre-annealing results in a drastic increase of (DZ/Z)j ~from 155% to 260%! and decrease of the asymmet...

A versatile platform for magnetostriction measurements in thin films

M. Pernpeintner, R. B. Holl€ ander, M. J. Seitner, E. M. Weig, R. Gross, S. T. B. Goennenwein, and H. Huebl Walther Meißner Institut, Bayerische Akademie der Wissenschaften, D 85748 Garching, Germany Nanosystems Initiative Munich, Schellingstraße 4, D 80799 M€ unchen, Germany Physik Department, Technische Universit€ at M€ unchen, D 85748 Garching, Germany Department of Physics, University of Ko...

Negative Magnetoresistance in Amorphous Indium Oxide Wires

We study magneto-transport properties of several amorphous Indium oxide nanowires of different widths. The wires show superconducting transition at zero magnetic field, but, there exist a finite resistance at the lowest temperature. The R(T) broadening was explained by available phase slip models. At low field, and far below the superconducting critical temperature, the wires with diameter equa...

Fermions and Bosons in Superconducting Amorphous Wires

We discuss the destruction of superconductivity in quasi-one-dimensional systems due to the interplay between disorder and Coulomb repulsion. We argue that to understand the behavior of the system one has to study both fermionic and bosonic mechanisms of suppression of superconductivity. The former describes reduction in the mean field critical temperature Tc, while the latter refers to thermal...

Direct measurements of magnetostrictive process in amorphous wires using scanning tunneling microscopy