Unusual room temperature ferromagnetism in bulk sintered GaP doped with copper

Frank J. Owens, Amita Gupta, K. V. Rao, Zafar Iqbal, J. M.Osorio Guillen, R. Ahuja, J. H. Guo

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Robust room temperature ferromagnetism is obtained in single phase Gallium Phosphide doped with Cu2+ prepared by simple solid state reaction route. The saturation magnetization at 300 K is 1.5 × 10-2 emu/g and the coercivity was found to be 125 Oe. A strong ferromagnetic resonance signal confirms the long range magnetic order which persists to temperatures as high as 739 K. X-ray absorption spectroscopy (XAS) indicate that Cu is in a +2 state. Ab initio calculations also show that the ferromagnetic ordering is energetically favorable in Cu doped GaP. When the spin-orbit coupling is included we get an enhanced total magnetic moment of 0.31 μB with a local moment on Cu 0.082 and on P 0.204 μB per atom.

Original languageEnglish (US)
Pages (from-to)3043-3045
Number of pages3
JournalIEEE Transactions on Magnetics
Volume43
Issue number6
DOIs
StatePublished - Jun 2007

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

Keywords

  • GaP:Cu
  • Magnetic resonance
  • Magnetic semiconductors
  • Materials science and technology
  • Spintronics

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