Effect of microstructure on the electronic transport properties of epitaxial CaRuO3 thin films

Gopi Nath Daptary, Chanchal Sow, Suman Sarkar, Santosh Chiniwar, P. S.Anil Kumar, Anomitra Sil, Aveek Bid

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

We have carried out extensive comparative studies of the structural and transport properties of CaRuO3 thin films grown under various oxygen pressure. We find that the preferred orientation and surface roughness of the films are strongly affected by the oxygen partial pressure during growth. This in turn affects the electrical and magnetic properties of the films. Films grown under high oxygen pressure have the least surface roughness and show transport characteristics of a good metal down to the lowest temperature measured. On the other hand, films grown under low oxygen pressures have high degree of surface roughness and show signatures of ferromagnetism. We could verify that the low frequency resistance fluctuations (noise) in these films arise due to thermally activated fluctuations of local defects and that the defect density matches with the level of disorder seen in the films through structural characterizations.

Original languageEnglish
Pages (from-to)74-79
Number of pages6
JournalPhysica B: Condensed Matter
Volume511
DOIs
StatePublished - 15 Apr 2017
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2017 Elsevier B.V.

Keywords

  • A. Thin films
  • B. Strain
  • C. Resistivity
  • D. Magnetoresistance
  • E. Hysteresis F. Resistance fluctuation

Fingerprint

Dive into the research topics of 'Effect of microstructure on the electronic transport properties of epitaxial CaRuO3 thin films'. Together they form a unique fingerprint.

Cite this