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Quantum Magnetism and Quantum Entanglement

Note - IPM

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Jahanfar Abouie<br />

Adv Cond Mat<br />

Smr School<br />

2012-IPM<br />

13/<br />

Theory of magnetism-Interactions<br />

exchanged<br />

→ Parallel spins, Ferromagnetic<br />

Origin : Orthogonal orbitals<br />

→ Antiparallel spins, Antiferromagnetic<br />

Origin: Non-orthogonal orbitals<br />

Bethe-Slater curve (Schematic)<br />

: radius of an atom<br />

: radius of its 3<br />

shell of electrons<br />

B. D. Cullity, C. D. Graham, “Introduction to magnetic materials” 2 nd Edt. IEEE Press (2009)

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