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

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Page 129

Then in performing thermal

terms with precisely one occupied state ( the totally unoccupied states do not

contribute because K | 000 ) = 0 ) . In fact the dominant term in any thermal

Then in performing thermal

**averages**, the greatest contribution will come fromterms with precisely one occupied state ( the totally unoccupied states do not

contribute because K | 000 ) = 0 ) . In fact the dominant term in any thermal

**average**...Page 301

behaviour of the Slater - Pauling curve ū ( N ) reported earlier , which gives the

where one half d - band ( with spin up ) is full , the shifting of the bands produced

...

behaviour of the Slater - Pauling curve ū ( N ) reported earlier , which gives the

**average**moment in ferromagnetic alloys ( Fig . 1 ) . a ) In Ni or Co ( Fig . 9a , b ) ,where one half d - band ( with spin up ) is full , the shifting of the bands produced

...

Page 411

matrix elements among them of chtq - qCkCf . Consequently , the expansion ( 22

) of the Hamiltonian in clusters of interacting quasi - particles can be truncated

after ...

**Average**values of nk for such states are small , as are**average**values of thematrix elements among them of chtq - qCkCf . Consequently , the expansion ( 22

) of the Hamiltonian in clusters of interacting quasi - particles can be truncated

after ...

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### Contents

LOMER Band theory and magnetism | 1 |

PHILLIPS Band theory of transition metals | 22 |

JACCARINO Studies of the hyperfine interaction in transi | 39 |

Copyright | |

19 other sections not shown

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### Common terms and phrases

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