## Proceedings of the International School of Physics "Enrico Fermi.", Volume 37N. Zanichelli, 1967 - Nuclear physics |

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Page 88

these is the exclusion principle which , by keeping like - spin electrons apart , leads to spin - dependent terms in the

these is the exclusion principle which , by keeping like - spin electrons apart , leads to spin - dependent terms in the

**energy**— the exchange terms . The second effect concerns unlike spins which stay apart from each other because ...Page 93

In this case ferromagnetism is possible due to either the « free - electron - gas - like » exchange

In this case ferromagnetism is possible due to either the « free - electron - gas - like » exchange

**energy**being sufficiently large , or to Hund's rule alignment of electrons on the same atom , or a combination of both .Page 94

This will certainly happen if the band

This will certainly happen if the band

**energy**is small compared to the polarity**energy**. On the other hand , if the minimum is close to the H - F minimum than the procedure used here is quite satisfactory . For the determinantal wave ...### What people are saying - Write a review

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### Contents

LOMER Band theory and magnetism | 1 |

JACCARINO Studies of the hyperfine interaction in transi | 39 |

P W ANDERSON and W L MCMILLAN Multiplescattering | 50 |

Copyright | |

25 other sections not shown

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### Common terms and phrases

alloys amplitude analytic Anderson approximation assume average band becomes Born bound calculation complex computed condition conduction consider contribution correct correlation corresponding coupling curve defined density depends determined discussed effect electrons energy equation exchange expected expression fact factor Fermi Fermi level ferromagnetic field function given gives Hamiltonian host metal impurity atom included integral interaction interesting lattice limit localized magnetic matrix element means metals method moments momentum normal obtained occur operator orbital particle perturbation Phys physical plane polarization poles positive possible potential present problem properties range relation replaced represent resonance scattering screening Sect seems shift shown similar simple solution spin structure surface temperature theory tion transition metals usual wave wave functions write written zero