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Superconducting Films

#0130


Ion synthesis of high temperature superconducting films.

Tech Area / Field

  • MAT-SYN/Materials Synthesis and Processing/Materials

Status
8 Project completed

Registration date
13.12.1993

Completion date
03.12.1997

Senior Project Manager
Kondratenkov Yu B

Leading Institute
Russian Academy of Sciences / Kazan Physical-Technical Institute, Russia, Tatarstan, Kazan

Collaborators

  • CNRS / IN2P3, France, Paris

Project summary

The project aims are:

1. Formation of high temperature superconducting (HTSC) thin films by means of modifications of structure and composition of non-superconducting tetragonal Y-Ba-Cu-O ceramics by using ion implantation.

2. The study of possibilities of formation spatially localized HTSC areas on semiconducting substrate.

Successes in formation of thin superconducting layers (with predetermined geometry) on semiconductors will give a possibility of wide using of HTSC properties in microelectronics (as conducting paths, Josephson contacts, sensors etc.). Ion implantation is a very convenient method of precise doping by any atoms with required configuration of formed layer within a sample. Since superconducting properties of Y-Ba-Cu-O materials depend strongly on a relative content of oxygen the implantation of appropriate amounts of oxygen or halogen ions allows to produce thin superconducting layers on initially non-superconducting matrix.

Although the modification of properties of HTSC layers under particle irradiation have been investigated rather intensively by several groups but it concerns mainly the degradation of HTSC properties. The results on synthesis of HTSC films have been presented only in few papers. However, the high temperature annealing of implanted layers for creation of superconductivity is usually used.

Experiments on modification of properties of different materials by high dose ion implantation have been carried out in the our Laboratory during last years. In particular an improvement of materials for IR optics for navigation systems has been performed. As for the Project aims the preliminary investigations carried out in the Laboratory showed a principle possibility of the formation of thin superconducting layers of Y-Ba-Cu-O ceramics by the high dose ion implantation. The special implantation conditions for forming the HTSC films without any following high temperature treatments have been found. Adding a required portion of a deficient element into non-superconducting substrate we can form HTSC 3 thin films in it. Moreover this method allows easy to form the different elements for microelectronics devices such as conducting paths, base of transistors. Josephson contacts etc.

At the same time the formation and the investigation of these materials can be successful providing the participation of weapon scientists and the. uses of their currently available equipment and high technologies. Thus the project purpose is well addressed the ISTC's objectives.

An object of investigation is superconducting layers especially on the basis of Y-Ba-Cu-O on semiconductors. HTSC films are to be produced and investigated in Laboratory of Radiation Physics as well as in The State Institute of Applied Optics using available technological and diagnostic equipment.

Investigations of physical properties of obtained thin superconducting films will be carried out by different methods (electroresistivity measurements, magnetic resonance, RHEED, XRD, electron microscopy, etc.). The laboratory has got an implanter, laser equipment and diagnostic methods mentioned above.


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