Phys. Rev. B 73, 012415 (2006) [4 pages]CeMnNi4: Impostor half metalReceived 12 October 2005; published 31 January 2006 Recent experiments show CeMnNi4 to have a nearly integer magnetic moment and a relatively large transport spin polarization, as probed by Andreev reflection, suggesting that the material is a half metal or close to it. However, the calculations reported here show that it is not a half metal at all, but rather a semimetal of an unusual nature. Phonon properties should also be quite unusual, with rattling low-frequency Mn modes. Nontrivial transport properties, including a large thermoelectric figure of merit ZT, are predicted in the ferromagnetic state of the well-ordered stoichiometric CeMnNi4. URL:
http://link.aps.org/doi/10.1103/PhysRevB.73.012415
DOI:
10.1103/PhysRevB.73.012415
PACS:
75.50.−y
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