Use of cubic Nd-Ba-Cu-O seeds to create (theta)(100), 90(degree)-(theta)(100), and (theta)(001) tilt Y-Ba-Cu-O grain boundaries

摘要

Using seeding techniques to control the orientation of grains, we have been able to create a wide variety of YBa(sub 2)Cu(sub 3)O(sub 6+x), grain boundaries. In addition to five domain samples with 90(degree)(100) twist and tilt grain boundaries, we have now developed a method to produce grain boundaries in the same sample that have the misorientations (theta)(001) tilt, (theta)(100) tilt, and 90(degree) (approximately) (theta)(100), where the disorientation angle (theta) is fully controllable. We will demonstrate how these boundaries can be synthesized, give experimental evidence via polarized light microscopy and electron backscatter patterns (EBSP) that the intended grain boundaries were indeed formed, and discuss the importance of these boundaries in future grain boundary studies.