Order-disorder transition induced by deformation of vortex lines at the twin boundaries in YBa$_2$Cu$_3$O$_{7-δ}$-crystals: test of the Lindemann criteria

Yu. T. Petrusenko; A. V. Bondarenko; A. A. Zavgorodniy; M. A. Obolenskii; V. I. Beletskii

paper

Order-disorder transition induced by deformation of vortex lines at the twin boundaries in YBa $_{2}$ Cu $_{3}$ O $_{7 - δ}$ -crystals: test of the Lindemann criteria

arXiv:0803.1079

Abstract

We show that rotation of the magnetic field off the plane of twin boundaries (TB's) induces transition of an ordered vortex solid phase to a disordered one. This transition arises due to appearance of transverse deformations of vortex lines near the TB's, $u_{t, T B}$ , the amplitude of which satisfies the Lindemann criteria, $u_{t, r p} = c_{L} a_{0}$ . This order-disorder transition is accompanied by an increase in the depinning current, by crossover from an elastic creep to plastic one, and by appearance of the $S$ -shaped voltage-current characteristics.

4 pages, 4 figures

Order-disorder transition induced by deformation of vortex lines at the twin boundaries in YBa2​Cu3​O7−δ​-crystals: test of the Lindemann criteria

Abstract

Order-disorder transition induced by deformation of vortex lines at the twin boundaries in YBa $_{2}$ Cu $_{3}$ O $_{7 - δ}$ -crystals: test of the Lindemann criteria