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

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Page 121

absolute zero and with impurity spin } a singlet bound state is formed for

antiferromagnetic

of diagonalizing the Hamiltonian within the restricted manifold of states obtained

by ...

absolute zero and with impurity spin } a singlet bound state is formed for

antiferromagnetic

**coupling**. This bound state is obtained by the obvious methodof diagonalizing the Hamiltonian within the restricted manifold of states obtained

by ...

Page 203

( 120 ) 1 Ã Ex - E = 0 ; V Ex . - E = 0 , slet it ; L . - € , exp [ - 4 / | Jot or ferromagnetic

state is lowest : EN - E , exp [ - 4 / Jle ] and for antiferromagnetic

singlet ...

( 120 ) 1 Ã Ex - E = 0 ; V Ex . - E = 0 , slet it ; L . - € , exp [ - 4 / | Jot or ferromagnetic

**coupling**, for singlet and triplet states . For ferromagnetic**coupling**, the tripletstate is lowest : EN - E , exp [ - 4 / Jle ] and for antiferromagnetic

**coupling**thesinglet ...

Page 204

Although it is known that the analogous trial state in the case of an ordinary

potential gives the wrong answer for E , , whose exact form is analytic in the

fact Yoshida ...

Although it is known that the analogous trial state in the case of an ordinary

potential gives the wrong answer for E , , whose exact form is analytic in the

**coupling**strength [ 31 ] , it may nevertheless be correct in the present case . Infact Yoshida ...

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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