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| Creator | Title | Description | Subject | Date | ||
|---|---|---|---|---|---|---|
| 1 |
 | Mattis, Daniel C. | Band theory of ferromagnetism, antiferromagnetism, and spin waves | Intra-atomic exchange (Hund's rule mechanism) and Heisenberg nearest-neighbor exchange are examined for their role in the ferromagnetism of metals with degenerate bands. The equations of motion of spin waves valid near T=0°K are derived, and a number of branches are found. When the equations are ... | Orbital degeneracy; Indirect exchange theory; Band theory | 1964 |
| 2 |
 | Mattis, Daniel C. | Ferromagnetism and spin waves in the band theory | Intra-atomic exchange (Hund's rule mechanism) and Heisenberg nearest-neighbor exchange are examined for their role in the ferromagnetism of metals with degenerate bands. We examine the ground state, and find there is ferromagnetism once the largest eigenvalue j00 of the exchange matrix exceeds 1/2... | Band theory; Hund's rule | 1963-12 |
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