| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials Processing and Kinetic Phenomena: From Thin Films and Micro/Nano Systems to Advanced Manufacturing
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| Presentation Title |
Thin Film NiCr-, TiCr- & CuNi-based Cermets for Low-temperature Ultra-low Magnetoresistance Thermometers |
| Author(s) |
Joyce Palmer-Fortune, Nathanael Fortune, Neha Kondedan, Andreas Rydh |
| On-Site Speaker (Planned) |
Joyce Palmer-Fortune |
| Abstract Scope |
Measurements in high magnetic fields (heat capacity, thermal conductivity, thermopower, magnetocaloric, thermal Hall effect) require low mass thermometers sensitive over a wide temperature range with rapid thermal response and minimal, easily correctable magnetoresistance. We developed a new granular-metal oxide cermet for this purpose by co-sputtering NiCr and SiO2. We found that co-sputtered NiCr-SiO2 in mixed Ar:O2 working gas can produce resistive thin film thermometers sensitive enough to be used from room temperature to below 100mK in magnetic fields up to at least 35 tesla.
Recently we have grown and characterized similarly grown CuNi- and TiCr-based cermet films. CuNi-SiO2 thin film cermets generally require more oxygen in the working gas compared to NiCr-SiO2 and TiCr-SiO2, yielding thermometers that are much less sensitive compared to similar NiCr-Based thermometers. Initial results show TiCr-based cermet thin film thermometers are much more like the NiCr-based cermet thin film thermometers. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Composites, Thin Films and Interfaces, Characterization |