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

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Page 35

4 ) mij ( r ) m E , - E , m 1 + ( effective mass sum

band levels also if enough terms are included in ( 3 . 4 ) . In practice , however ,

sum

3 .

4 ) mij ( r ) m E , - E , m 1 + ( effective mass sum

**rule**) . This result is valid for dband levels also if enough terms are included in ( 3 . 4 ) . In practice , however ,

sum

**rules**are useful when only one or two terms need be retained . To convert (3 .

Page 93

... or to Hund ' s

of both . To determine the importance of Hund ' s

calculate just how frequently 3d8 atoms are present in nickel from this point of

view .

... or to Hund ' s

**rule**alignment of electrons on the same atom , or a combinationof both . To determine the importance of Hund ' s

**rule**we shall go on now tocalculate just how frequently 3d8 atoms are present in nickel from this point of

view .

Page 95

These 3d8 states have , of course , a Hund ' s

estimated by Slater to be ~ 0 . 06 eV / atom and is to be reduced by 22 in the

correlated case . The remaining 0 . 01 eV or so is of the same order of magnitude

as ...

These 3d8 states have , of course , a Hund ' s

**rule**coupling of spins which wasestimated by Slater to be ~ 0 . 06 eV / atom and is to be reduced by 22 in the

correlated case . The remaining 0 . 01 eV or so is of the same order of magnitude

as ...

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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