Microwave properties of YBa$_2$Cu$_3$O$_{7-δ}$ films with BaZrO$_3$ nanoinclusions

N. Pompeo; E. Silva; R. Marcon; V. Galluzzi; G. Celentano; A. Augieri; T. Petrisor

doi:10.1016/j.physc.2007.03.104

paper

Microwave properties of YBa $_{2}$ Cu $_{3}$ O $_{7 - δ}$ films with BaZrO $_{3}$ nanoinclusions

arXiv:cond-mat/0610628 · doi:10.1016/j.physc.2007.03.104

Abstract

We present measurements of the microwave complex surface impedance at 47.7 GHz in YBa $_{2}$ Cu $_{3}$ O $_{7 - δ}$ (YBCO) films deposited by pulsed laser deposition with the explicit goal to introduce BaZrO $_{3}$ (BZO) nanoinclusions. Composite targets obtained by addition of BZO powder in molar percents ranging from 2.5 to 7 mol.% have been prepared and characterized. Measurements of the microwave surface impedance indicate a broadened transition in zero field, however compensated by a very large pinning frequency, indicating that while intergrain properties are still to be optimized the effect of nanometric inclusions substantially enhances the intragrain vortex pinning.

2 printed pages, 2 figures, proceedings of M2S (Dresden), to appear in Physica C

Microwave properties of YBa2​Cu3​O7−δ​ films with BaZrO3​ nanoinclusions

Abstract

Microwave properties of YBa $_{2}$ Cu $_{3}$ O $_{7 - δ}$ films with BaZrO $_{3}$ nanoinclusions