Superconducting Amorphous Thin Films Offer Applications in Modern Quantum Technology

Superconducting Amorphous TiNiSn Alloys Unlock New Potential for Quantum Technology. Our Head of Components, José Barzola Quiquia, recently contributed to a study investigating the superconducting properties of amorphous TiNiSn films at low temperatures.

Key Research Findings

Superconductivity at Low Temperatures

The study demonstrates that amorphous TiNiSn thin films exhibit superconducting properties when cooled to liquid helium temperatures. The critical transition temperature (Tc) reaches up to 4.1 K, depending on heat treatment. This behavior suggests strong electron-phonon coupling, a crucial factor in understanding superconductivity in this material.

Stability and Structure

Amorphous TiNiSn thin films exhibit remarkable stability, attributed to electronically stabilized Hume-Rothery phases, where the hybridization between Ti-dd and Ni-dd orbitals plays a key role. When crystallized at approximately 785 K, the material forms an ordered half-Heusler phase with an unusual atomic arrangement (TiNiSn instead of the more common NiTiSn configuration). The ability to transition between amorphous and crystalline states opens exciting possibilities for tailored material properties.

Potential Applications and Impact

While the research is still in its early stages, the unique properties of amorphous TiNiSn thin films could drive innovations in several fields:

• Electronic Components and Sensors: The exceptional electrical properties of amorphous TiNiSn could enable new developments in high-frequency and quantum components, such as highly sensitive sensors or superconducting transistors optimized for minimal energy loss.
• Energy Transmission & Storage: Superconducting materials facilitate loss-free energy transmission, particularly in specialized applications requiring maximum efficiency.
• Medical Technology: Advanced superconducting magnets could enhance the performance of MRI (Magnetic Resonance Imaging) systems, enabling more precise diagnostics.
• Thermoelectric Generators: The distinctive electronic structure of this material could improve energy conversion efficiency, contributing to more robust and sustainable thermoelectric generators.

At FHR Anlagenbau GmbH, we support pioneering research with our advanced vacuum coating systems, enabling the precise fabrication of amorphous TiNiSn thin films renowned for their stability and exceptional properties. Through close collaboration with scientists and industry partners, we help transition cutting-edge research into practical applications.

For further details, please refer to the full article:
Superconductivity in the amorphous phase of the half-Heusler TiNiSn alloy