Point contact tuneling apparatus with temperature and magneic field control.
The design and testing of a new device for point contact tunneling measurements in superconductors are described. The insert is designed for use with a continuous flow cryostat which allows for a large range of sample temperatures from 1.5 K to room temperature. The use of nonmagnetic parts allows tunneling measurements to be performed in high magnetic fields. Testing was carried out on a conventional superconductor, Nb, in fields up to 6 T using Nb and Au tips to obtain superconductor-insulator-superconductor and superconductor-insulator-normal metal junctions. In addition, a moderate-{Tc} oxide superconductor, Ba{sub 1-x}K{sub x}BiO{sub 3}, was used to obtain temperature and magnetic field dependencies of the energy gap.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- DOE Contract Number:
- DE-AC02-06CH11357
- OSTI ID:
- 938380
- Report Number(s):
- ANL/MSD/JA-29901; CRYOAX; TRN: US200908%%217
- Journal Information:
- Cryogenics, Vol. 38, Issue 9 ; 1998; ISSN 0011-2275
- Country of Publication:
- United States
- Language:
- ENGLISH
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