Abstract
The texture and magnetic anisotropy of a YBa2Cu3O7-x (YBCO) film growth onto a MgO substrate are analyzed in order to understand the relation between them. X-ray diffraction shows the presence of the (00l) reflections from the YBCO layer with a grain’s fraction value 98%. Rocking Curves (RC) measurements reveal an out-of-plane texture with a full width at the half maximum of 0.81°, revealing a high uniaxial texture in the YBCO film. The temperature dependence of the susceptibility measurements obtained under many applied fields along Hext ||c-axis and Hext||ab-plane reveals strong relationship between the uniaxial texture and the magnetic anisotropy, confirming the high ordering of the CuO2 superconducting planes. In addition, the critical current density values are obtained from the hysteresis loops and compared to similar YBCO films with uniaxial and biaxial texture reported elsewhere.
Highlights
The importance of electrical transport properties in superconducting materials has led to an extensive experimental research and development of highly textured layers of YBa2Cu3O7-d (YBCO) on a variety of substrates [1]
We found that uniaxial texture ordering influences in the magnetic anisotropy of the YBCO film
The texture and magnetic anisotropy of a superconducting YBCO film grown onto MgO substrate have been analyzed
Summary
The importance of electrical transport properties in superconducting materials has led to an extensive experimental research and development of highly textured layers of YBa2Cu3O7-d (YBCO) on a variety of substrates [1]. Much investigation have been performed on both, uniaxial and biaxial, YBCO films grown onto different substrates such as LaAlO3 (aLaAlO3 $ 3:8A_ ) and SrTiO3 (aSrTiO3 $ 3:9A_ ) because their cell parameters are quite similar to that for YBCO (aYBCO $ 3:8A_ ) [6] Those studies focus on the fabrication, texture and characterization by different physical and chemical techniques of the YBCO film [7,8,9] without paying much attention to the magnetic anisotropy properties [10]. No studies have been reported about the magnetic anisotropy of uniaxial or biaxial YBCO films grown onto MgO single-crystal substrate Such studies are important since well-oriented crystals achieve a high magnetic anisotropy and high current density values. The obtained critical current density is compared to those ones reported elsewhere for other similar uniaxial and biaxial YBCO films
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