A kind of out-of-plane highly oriented cufesb film preparation method

Abstract

The invention discloses a method for preparing an out-of-plane highly oriented CuFeSb thin film. The method comprises the following steps: S1. preparing a CuFeSb polycrystalline target; S2. providing a cubic or tetragonal crystal substrate; S3. cleaning the crystal substrate; S4. performing annealing treatment on the cleaned single crystal substrate; S5. ablating the CuFeSb polycrystalline target, and growing a CuFeSb thin film on the surface of the single crystal substrate. The present invention utilizes pulsed laser deposition technology, through high-vacuum equipment, excimer laser hardware, synthesis of polycrystalline targets, selection of substrates, treatment of substrates, and stable control of film synthesis parameters, to prepare highly oriented CuFeSb out of plane The thin film is helpful to promote the research on the physical properties of CuFeSb, and the thin film has great advantages over polycrystalline materials, which expands the means of controlling the physical properties of CuFeSb, and is of great value to the material in basic research and magnetic material applications.

Description

technical field [0001] The invention relates to the field of material synthesis, in particular to a method for preparing an out-of-plane highly oriented CuFeSb thin film. Background technique [0002] Iron-based superconductors are the second largest family of high-temperature superconductors after copper-based high-temperature superconductors discovered in 2008. Its discovery broke the myth that iron elements are not conducive to the formation of superconductivity. The crystal structure, magnetic structure and electronic state diagram of the iron-based superconductor system and the copper-based superconductor are very similar, especially the structure of the iron-based superconductor is similar to the copper-oxygen plane of the high-temperature superconductor, and superconductivity occurs on the iron-based plane , a two-dimensional superconducting material. Therefore, the research on iron-based superconductivity will help to promote the solution process of high-temperature...

AI Technical Summary

Problems solved by technology

[0005] At present, the research on the physical properties and regulation of CuFeSb is mainly carried out on polycrystalline samples. Doping chemical elements on polycrystalline samples is the most important method of regulation. The regulation method is single, and no obvious regulation effect has been achieved yet.

Experimentally, it is also impossible to perform multi-dimensional external field regulation on polycrystalline samples. For example, while introducing substrate stress to modulate the physical properties of the film, the gate voltage is applied to the film sample to introduce electric field effects.

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