Crystalline effect on ferromagnetism and magneto-transport of epitaxial semiconducting Co:ZnO films

Yuhung Liu, Suling Chiu, Jung Chun Andrew Huang, Huashu Hsu, Yenfa Liao, Chihhao Lee, Chengpang Lin, Hsiung Chou, S. F. Chen, Chuanpu Liu, Zhongjun Li, Huaili Qiu

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

We have studied the magnetic origin and the effect of crystallinity of epitaxial semiconducting Co:ZnO films on ferromagnetism and magneto-transport properties by comparing signal-type domain (SD) and twin-type domain (TD) structure films grown in the same conditions. A higher saturation magnetization in TD films than that in SD films is observed, suggesting that bound charge carriers, produced mainly by defects in films, play a dominant role in ferromagnetism. A lower concentration of itinerant carriers in TD films than that in SD films is detected, which helps separate the effects of bound and itinerant carriers on ferromagnetism and magnetotransport. We hypothesize the interaction of the spin moments of itinerant carrier with the bound carrier mediated ferromagnetic domain results in the weaker strength of the anomalous Hall effect in TD films than that in SD films. It is likely that both itinerant and bound carriers are important for spintronic application indiluted magnetic oxides and could be modified by control of crystal structure.

Original languageEnglish
Pages (from-to)267-272
Number of pages6
JournalThin Solid Films
Volume605
DOIs
Publication statusPublished - 2016 Apr 30

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Crystalline effect on ferromagnetism and magneto-transport of epitaxial semiconducting Co:ZnO films'. Together they form a unique fingerprint.

Cite this