### Abstract

We have studied the electronic structure of Y(Co_{1-x}Al_{x})_{2} with x=0.0, 0.12, and 0.18, which compositions cover the paramagnetic, metamagnetic, and ferromagnetic phases, by means of photoemission and inverse-photoemission spectroscopy. With Al substitution, broad peaks near the Fermi level (E_{F}) are shifted upwards and one of them crosses E_{F} as predicted by band-structure calculation, although the peaks are much broader than predicted by the calculation. The overall Co 3d band is narrow and has a high binding energy tail compared to the band-structure calculation, indicating significant electron correlation effects in the Co 3d band. In order to explain these observations, model self-energy corrections have been applied to the band density of states. The lower energy scale of the self-energy is found to lie in the same range as the characteristic temperature of the magnetic susceptibility.

Original language | English |
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Pages (from-to) | 538-542 |

Number of pages | 5 |

Journal | Physical Review B - Condensed Matter and Materials Physics |

Volume | 60 |

Issue number | 1 |

Publication status | Published - 1999 |

Externally published | Yes |

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### ASJC Scopus subject areas

- Condensed Matter Physics

### Cite this

_{1-x}Al

_{x})

_{2}.

*Physical Review B - Condensed Matter and Materials Physics*,

*60*(1), 538-542.