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キーワード:
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要旨:
The quaternary intermetallic Heusler compounds CoFeMnZ (Z = Al, Ga, Si,
or Ge) with 1 : 1 : 1 : 1 stoichiometry were predicted to exhibit
half-metallic ferromagnetism by ab initio electronic structure
calculations. The compounds were synthesized using an arc-melting
technique and the crystal structures were analyzed using x-ray powder
diffraction. The electronic properties were investigated using hard
x-ray photoelectron spectroscopy. The low-temperature magnetic moments,
as determined from magnetization measurements, follow the Slater-Pauling
rule, confirming the proposed high spin polarizations. All compounds
have high Curie temperatures, allowing for applications at room
temperature and above.
