The phenomenon of superconductivity was first discovered in
1911. The first generation of materials utilised metal compounds
and alloys, but could only operate at extremely low temperatures,
typically less than 30K.
The second generation of High temperature superconductors were
discovered in the 1980's. (2G-HTS). These utilise complex crystal
structures incorporating Barium Copper Oxides along with Rare Earth
elements. We refer to these are "Rare-Earth Barium Copper Oxide"
superconductors. (REBCO HTS, or 2G-HTS)
These materials offer unprecedented performance that stands well
above any other superconductor in terms of temperature and magnetic
field. However, the high performance of these materials can only be
achieved by precisely aligning the crystal structure of the
Fujikura pioneered, and optimised the manufacturing processes to
produce these materials in the 1990's. This was recently recognised
by the prestigious "IEEE Dr James Wong Award for Continuing and
Significant Contributions to Superconductivity".
The first process is called Ion Beam Assisted Deposition.
(IBAD). This process fabricates a highly textured, uniform buffer
layer on a metal substrate. This layer consists of a uniform MgO
substrate which aids crystal alignment of the subsequent
The superconducting layer is subsequently added using "Pulsed
Laser Deposition" (PLD). Fujikura developed the hot wall technique
which greatly improved the superconducting properties of REBCO
Fujikura's superconducting wire has
extremely uniform performance over long lengths. The graph below
shows the uniformity of critical current over a 600m length. Batch
to batch performance is equally uniform. In-Field performance is
also very repeatable which is an essential factor for high
performance complex magnets.
Fujikura is routinely supplying 2G-HTS
full range of established and emerging technologies.
Our tapes are routinely used for demanding applications such as
Nuclear Magnetic Resonance (NMR), as well as "high-field"
scientific magnets for accelerators, or space applications which
often utilising magnetic fields for particle detection.
Our tapes are used for Fault Current Limiters which can help
control electrical current in power networks, as well as "current
leads" for MRI scanners. We are also active in emerging
technologies such as Nuclear fusion and efficient motors for energy
generation and transportation.