Product Code:

2G High Temperature Superconductor

Backed by records and results, Fujikura is a leading manufacturer of second-generation High Temperature Superconductor (2G HTS) wires utilising Yttrium and Gadolinium-based ceramics (YBCO) which can operate up to critical temperatures of 77K - only requiring the usage of liquid Nitrogen refrigerants.  This permits a wide range of practical and cost-effective applications which are no longer confined to the boundaries of laboratories and academic institutions.


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 Fujikura's Yttrium-based superconducting wires possess superior characteristics over
Bismuth-based superconductors under an applied magnetic field allowing it to retain its superconductive properties under real-world operating conditions. Our 2G HTS tape has also demonstrated the ability to generate remarkably high magnetic flux densities and critical currents at wide operating temperatures.
Combined with highly robust mechanical properties, Fujikura's 2G HTS wires are ideal for a wide range of industrial and scientific applications today.


Characteristics of our 2G HTS:

Since the discovery of High Temperature Superconductivity more than 20 years ago, Fujikura has been at the forefront of its research and development with the aim of implementing commercially-viable Superconductivity for real world applications. From being the first to fabricate 100 meter long HTS wires in 2004 to the current production lengths of 800 meters and above, Fujikura has been setting records as testaments to our technical progress and dedication to the field of Superconductivity.

Fujikura is now capable of routinely manufacturing wires with critical current densities greater than 3,000,000 A/cm2 and production rates of 10-100m/h - a phenomenal leap in progress from 500,000 A/cm2 at 10cm/h in the 1990s. Even today, we are still pushing the boundaries as demonstrated by our current world record production Ic × L value of 466,981 A/cm.

Fujikura's technical report on the improved performance of Y-based superconducting wires  and developments of key technologies can be found Here (.PDF):

World Record.PNG


Fujikura's key technology to accomplishing higher performance:


As the operating temperatures and the maximum achievable critical currents are highly sensitive to the microstructure of the superconducting film, the manufacturing technique and conditions used are of paramount importance.

Fujikura's 2G HTS wires are manufactured using our advanced Ion Beam Assisted Deposition (IBAD) and Hot-wall Pulsed-Laser Deposition (PLD) techniques which we have perfected over the course of more than 20 years - allowing the production of longer lengths of high-quality tapes with greater critical current densities and at shorter processing times.



As the technical capabilities of 2G HTS tapes have progressively improved, the greater magnetic flux densities produced, compact tape-shape and longer lengths of the HTS wires appear to be a more attractive option for applications requiring the generation of strong electro-magnetic fluxes. Magnetic
Resonance Imaging (MRI) Scanners, Nuclear Magnetic Resonance (NMR) Spectrometers and Magnetic Levitation (Maglev) transport which conventionally depend on heavy, metallic Low Temperature Superconductors (LTS) could achieve greater performance and economic efficiency by utilising 2G HTS
Especially for electrical Motors and Generators, a superconducting electromagnetic core is able to provide a tremendous improvement in efficiency over conventional copper windings as there are virtually no heating losses; this allows for massive reductions in size and weight of the component which further surmounts to a
significant amount of savings in the long term.



Below can be found links to various technical reviews published on the applications and progress of our 2G HTS wire:

Daibo, M. ; Fujikura Ltd., Sakura, Japan;  Fujita, S.;  Haraguchi, M;  ijima, Y. "Evaluation of a 426 kJ Cryocooled Magnet and a Model Magnet With REBCO Coated Conductors", 16 September 2013.

Daibo, M. ; Fujikura Ltd., Sakura, Japan;  Fujita, S; Haraguchi, M.;  Iijima, Y. "Development of a 5T 2G HTS Magnet With a 20-cm-Diameter Bore",  13 February 2013.

Hidaka, H. ; Fujikura Ltd., Sakura, Japan;  Kurihara, C.; Daibo, M.;   ijima, Y.  "Quench Distribution During an Overcurrent Fault Condition in Highly Homogeneous REBCO Coated Conductor",  23 August 2013.

Daibo, M. ; Fujikura Ltd., Sakura, Japan;  Fujita, S;  Haraguchi, M.;  Hidaka, H.,  "Characteristics of Impregnated Pancake Coils Fabricated Using REBCO Coated Conductors",    14 December 2011.      

Daibo, M. ; Fujikura Ltd., Sakura, Japan;  Fujita, S.;  Haraguchi, M.;   Iijima, Y.  "Evaluation of the Normal-Zone Propagation Characteristics of REBCO Coated Conductors With Laminated Cu Tape", 17 February 2011.




For a comprehensive account of how Fujikura managed to establish itself
as one of the global leaders in HTS and the technical milestones achieved along
the way, please visit our Fujikura Japan website: here

If you would like to know more about the different variants and lengths of HTS tapes we offer, in-depth technical specifications and quotations, we will be more than happy to assist you and are eagerly
awaiting your query at:

Typical Specifications:

  • Based on standard critical current: Ic >500A/cm-width @ 77K, S.F.
  • Fujikura are now planning to change our origional 10mm wide wire to 12mm wide wire, these new products will be release in the second half of 2014.


  • Dimensions do not include thickness of insulating tape.


Fujikura 2G HTS Structure:



Fujikura have been activly selling our 2G HTS tape in the market for the past 9 years and to this date we  pride ourselves on being able to routinely produce 2G HTS tape with long single piece lengths of 500
meters and with high critical current values of 500A at 77k, s.f for our 10mm wide tape. In order to meet our clients' specific requirements, the production of 2G HTS wires is highly customised to individual orders by our advanced manufacturing facilities in Japan; various aspects include:

  •   Tape widths

  • Substrate layer thickness,

  • Stabilizer layer thickness.

  • The choice of a Polyimide insulating wrap.

   If you would like to know more about the different variants and lengths of HTS tapes we offer, in-depth technical specifications and quotations, we will be more than happy to assist you and are eagerly awaiting your query at: