کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1866678 1038037 2016 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Unconventional drop in the electrical resistance of chromium metal thin films at low temperature
ترجمه فارسی عنوان
کاهش غیر استاندارد در مقاومت الکتریکی فیلم های نازک فلز کروم در دمای پایین
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک و نجوم (عمومی)
چکیده انگلیسی


• The electrical resistance measurements were performed in several chromium films.
• We observed sudden decrease in the resistance around 1.5 K, but the electrical resistivity is not zero in all films.
• It is difficult to conclude whether a superconducting transition occurs contrary to the previous reports.

We studied the electrical resistance of single-crystal and polycrystalline chromium films. The ρ(T)ρ(T) curve of single-crystal films decrease with decreasing temperature and show humps at around 300 K consistent with the bulk chromium being an itinerant antiferromagnet. In the polycrystalline films, on the other hand, the ρ(T)ρ(T) curves deviate from those of the bulk chromium. Moreover, we observed sudden decrease in the resistance around 1.5 K. Although previous studies suggested that chromium films become superconductive (Schmidt et al. (1972) [12]), it is difficult to conclude whether a superconducting transition occurs because the electrical resistivity is not zero in all films. No anomaly was detected by resistance measurements around room temperature, and the sudden decrease in the resistance at low temperature may be attributed to the suppression of antiferromagnetic interaction by thinning down the chromium element.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters A - Volume 380, Issue 38, 7 September 2016, Pages 3133–3137
نویسندگان
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