Thermal conductivity of manganin below 1 K

✍ Scribed by I. Peroni; E. Gottardi; A. Peruzzi; G. Ponti; G. Ventura

• Book ID: 104355981
• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 152 KB
• Volume: 78
• Category: Article
• ISSN: 0920-5632
• DOI: 10.1016/s0920-5632(99)00606-4

✦ Synopsis

We carried out thermal conductivity measurements of Manganin wire having a composition of Cu 84%, Ni 4%, Mn 12% (sample '1) in the 0.1 + 1K temperature range, and of Manganin wire having a composition of Cu 86%, Ni 2%, Mn t2% (sample 2) in the 0.05 + 0.25K range.

The measurements were performed in a low-power dilution refrigerator.

For sample 1, the fit on the data gives a dependence on T: k = (0.79 + 0.01)T L22+°°2 mW/cmK; for sample 2, the fit. leads to k = (0.95 + 0.04)T 1A9+°°2 mW/cmK.

The difference in thermal conductivity in the overlapping temperature range depends on the different ratio of the Cu/Ni content of the samples. A similar sensitivity to a small difference in the composition has also been tound for other Cu alloys.