International Journal Of Applied Ceramic Technology, ss.1-8, 2021 (SCI-Expanded)
Although there are studies in literature using different number of seeds with
different arrangements, especially line and rectangular, it is seen that there is no
detailed study handling the levitation force together with trapped field properties
of triangular arrangement of seed in YBCO. Therefore, to further investigate
the magnetic properties of seeded YBCO superconductors, we have fabricated
cylindrical YBCO (YBa2Cu3O7) superconductors with triangular arrangement
of the seeds with different seed distances. Maximum levitation force values
were obtained as 39.4 N and 57.1 N, while the maximum guidance force values
were obtained as −4.6 N, and −8.7 N, respectively, with single-seeded and
triangular-seeded samples with seed distance of 14 mm. It was determined that
the trapped field, levitation force, and guidance force firstly decreased from the
single-seeded sample to the triangular-seeded sample with small seed distance
and then increased with increasing seed distance. Increased field trapping and
levitation force performances in the triangular-seeded samples with suitable
seed distance indicate that the triangular arrangement of seeds is an eligible
method to produce larger dimension YBCO samples with bigger shielding
current radius and bigger averaged trapped field values.