NiO thin film with an extremely high index (7 1 ¯ 4) on r-plane sapphire substrate

Xiang Ding, C. I. Sathish, Jiangtao Qu, Rongkun Zheng, Xun Geng, Xinwei Guan, Xiaojiang Yu, Mark B. H. Breese, Liang Qiao, Kiyonori Suzuki, Jiabao Yi*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Thin film epitaxy is essential for state-of-the-art semiconductor applications. The combination of different substrates and deposition methods leads to various crystallographic orientation relationships between thin films and substrates, which have a decisive impact on thin film performance. By utilizing pulsed laser deposition, we discovered a very high-index (7 1 ¯ 4) –oriented NiO thin film when deposited on r-plane (10 1 ¯ 2) sapphire substrates. The in-plane epitaxial relations are [13 1 ¯] NiO||[1 2 ¯ 10] Sapphire and [1 ¯ 12] NiO||[10 11 ¯] Sapphire , and the lattice mismatch is 3.2% and 0.4% along two directions, respectively. Exchange bias studies by the deposition of Co on NiO (111) and NiO (7 1 ¯ 4) show different behaviors, which may be associated with the spin density and alignment on the surface. Graphical abstract: [Figure not available: see fulltext.].

Original languageEnglish
Pages (from-to)1623-1630
Number of pages8
JournalEmergent Materials
Volume6
Issue number5
DOIs
Publication statusPublished - Oct 2023
Externally publishedYes

Bibliographical note

Copyright the Author(s) 2023. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Keywords

  • Epitaxy
  • Exchange bias
  • High index
  • NiO
  • R-plane sapphire

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