Unusual high-temperature ferromagnetism of PbPd0.81Co 0.19O2 nanograin film

H. L. Su, S. Y. Huang, Y. F. Chiang, J. C.A. Huang, C. C. Kuo, Y. W. Du, Y. C. Wu, R. Z. Zuo

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

Single-phase PbPd0.81Co0.19O2 film with a body-centered orthorhombic structure was prepared using the sol-gel spin-coating technique and an oxidation treatment. Film resistivity has a power dependence on temperature. The insulator-metal transition temperature was 358 K, markedly higher than the reported values of similar material systems. Ferromagnetism and superparamagnetism coexisted in the film and the ferromagnetism persisted up to 380 K. As temperature increased, the notable increasing tendencies were found for the film's saturation magnetization and for the magnetic field where saturation magnetization decreases abruptly. The special spin gapless band structure and the film's nanograin microstructure are likely responsible for these interesting properties.

Original languageEnglish
Article number102508
JournalApplied Physics Letters
Volume99
Issue number10
DOIs
Publication statusPublished - 2011 Sep 5

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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