Method for preparing FeSeTe film by pulse laser deposition coating technology

A pulsed laser deposition, iron-selenium technology, applied in the field of high-temperature superconducting thin films, can solve the problems of easy introduction of impurities and unfavorable film growth, and achieve the effect of overcoming the introduction of impurities, easy composition, and good crystal structure
CN104928630AInactive Publication Date: 2015-09-23NANJING UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NANJING UNIV
Publication Date
2015-09-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the field of novel Fe-based superconductors and particularly relates to a method for preparing a FeSeTe film by a pulse laser deposition coating technology. The method comprises the following steps: firstly, uniformly mixing and grinding Fe powder, Se powder and Te powder at a certain molar ratio; secondly, sintering the ground powder in a vacuum quartz tube at 700DEG C for 24 hours, performing quenching treatment when the sintered powder is at 400DEG C, grinding the sintered powder into powder again, pressing the powder in the size of a required target material, sintering the powder in the vacuum quartz tube at 700DEG C for 24 hours, and performing quenching treatment when the powder is at 400DEG C; adjusting laser parameters, performing pretreatment of the obtained target material, and performing film growth on a substrate within a certain time; and performing natural cooling in vacuum to obtain the required film. According to the method, the FeSeTe superconductive film is grown by utilizing the pulse laser deposition coating technology. The method has the advantages that the use is convenient, the coating speed is high, films of different components can be prepared, and the target material and the substrate are kept consistent in component more easily.
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Description

technical field

[0001] The invention belongs to the field of novel iron-based superconductors, and in particular relates to the technology of preparing a novel iron-based superconductor iron-selenium-tellurium high-temperature superconducting thin film by using pulsed laser deposition coating technology. Background technique

[0002] At the beginning of the 20th century, the phenomenon of superconductivity was accidentally discovered by the Dutch physicist H. Camerin Onnes in the laboratory. Then people began to study various types of superconductors, and devoted themselves to continuously increasing the superconducting temperature so that it can be applied in human life. The characteristics of zero resistance and complete diamagnetism of superconductors have made great contributions to the development of electric power, transportation and other industries. Previously, people's research on high-temperature superconductors focused more on copper oxides. With the deepening of...

Claims

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