Unconventional drop in the electrical resistance of chromium metal thin films at low temperature

M. Ohashi, K. Ohashi, M. Sawabu, M. Miyagawa, T. Kubota, K. Takanashi

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

We studied the electrical resistance of single-crystal and polycrystalline chromium films. The 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) 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.

Original languageEnglish
Pages (from-to)3133-3137
Number of pages5
JournalPhysics Letters, Section A: General, Atomic and Solid State Physics
Volume380
Issue number38
DOIs
Publication statusPublished - 2016 Sep 7

Keywords

  • Cr film
  • Electrical resistivity
  • Sheet resistance
  • Superconductivity

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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