Superconducting-magnetic heterostructures as a new method of decreasing transport AC losses in multifilamentary and coated superconductors

Magnetization losses in multiply connected YBa2Cu3O6+x-coated conductors

“…A way to reduce the hysteresis loss in such tapes by dividing them into a large number of parallel stripes segregated by non-superconducting resistive barriers was proposed in Refs. [17,18]. An experiment on small samples of YBCO films deposited on LaAlO3 substrate has confirmed the validity of that suggestion [19].…”

Influence of disorder on H c 2 ‐anisotropy and flux pinning in MgB 2

“…9. The copper sheathed wire prepared by an in-situ process [27] has rather small values. This can be explained by the ductility of copper, which does not allow for an efficient compression of the superconductor or its precursor powders, leading to a poor density of MgB 2 , thus enhancing p c .…”

(RE)Ba2Cu3O7 Coated Conductors for AC and DC Applications

“…All the different types of deposition techniques of buffer and superconductor such as: pulse laser deposition, PLD [6]; ion-beam assisted-deposition, IBAD, [6,7]; sputtering [8], chemical vapour deposition, CVD [9]; metal organic deposition, MOD, [10,11]; metal organic chemical vapour deposition, MOCVD [12]; thermal evaporation [13]; sol-gel deposition [14,15]; ink-jet printing and coating [16]; dip coating [17]; and liquid phase processing [18,19], Tab.1, have been used to manufacture shorter or longer pieces of the high temperature superconducting tapes on a laboratory scale [20,21]. There is an additional aspect to the multifilamentary conductor preparation, which is needed for AC applications [22]. The outline of the two main conductor architectures for DC and AC applications are presented in Fig.4 and the aspects concerning computer design and processing will be discussed in later paragraphs.…”

“…Such Ni-O layers are successfully used in LPE processing [18,19]. In the second generation AC conductors for small magnetic field ~ 0.4T, where interfilamentary decoupling is vital, magnetic buffer layer will be introduced [22,40,41]. There is a need for smoothness of the buffer layer to avoid the a-axis growth of YBa 2 Cu 3 O 7 .…”

“…Despite the excellent existing demonstrators there is continous development in many parallel directions to define economically viable and also reliable long length coated conducor technology, Table 3. Four different stages of such parallel development can be identified; (i) the near market design of fully engineered conductors for particular applications, (ii) incremental development of 'established' conductor processing routes, (iii) investigation of new routes for superconductor processing, and (iv) basic and enabling science to underpin materials processing [22,25]. Naturally the boundaries between these types of activity are processing [22,25].…”