Mechanical magnetoresistance in broken cold-pressed CrO2 powder sample

H. Liu, R. K. Zheng, Y. Wang, X. X. Zhang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Large negative magnetoresistance (MR)(|ΔR/R|=|[R(H)-R max]/Rmax|>50%) has been observed in the broken cold-pressed CrO2 powder samples near the room temperature, which is ascribed to the magnetic field-induced mechanical contact variation. This large, room-temperature negative MR might easily lead to a wrong conclusion that the spin-polarization is still very high at high temperatures. This observation may also point to the possibility to develop field sensors based on the mechanical MR.

Original languageEnglish (US)
Pages (from-to)211-215
Number of pages5
JournalJournal of Magnetism and Magnetic Materials
Volume302
Issue number1
DOIs
StatePublished - Jul 2006
Externally publishedYes

Keywords

  • CrO powder
  • Half metal
  • Magnetoresistance

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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