Coexistence of ultraviolet photo-response and room-temperature ferromagnetism in polycrystalline ZnO thin films

Mukes Kapilashrami, Jun Xu, Anis Biswas, Takahiko Tamaki, Parmanand Sharma, K. V. Rao, Lyuba Belova

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

The coexistence of ultraviolet (UV) photoconductivity (PC) and room-temperature ferromagnetism (RTFM) is observed in polycrystalline ZnO thin films deposited by unbalanced magnetron sputtering under high oxygen pressure. A significant increase in PC (∼ 870% to 40 000%) is observed with increasing film thickness and the consequent structural disorder and film porosity. In contrast, the saturation magnetization (MS) at room temperature is found to decrease from 1.02 emu/g to 0.53 emu/g with increasing film thickness from 50 to 150 nm.

Original languageEnglish
Pages (from-to)1291-1294
Number of pages4
JournalMaterials Letters
Volume64
Issue number11
DOIs
Publication statusPublished - 2010 Jun 15

Keywords

  • Photoconductivity
  • Room-temperature ferromagnetism
  • Unbalanced magnetron sputtering

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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