Quantum Magnetism and Quantum Entanglement
Note - IPM
Note - IPM
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Jahanfar Abouie<br />
Adv Cond Mat<br />
Smr School<br />
2012-IPM<br />
17/<br />
Theory of magnetism-Interactions<br />
Indirect exchange in metals: RKKY interaction or itinerant exchange<br />
Exchange interaction between magnetic ions mediated by conduction electrons.<br />
~ (2 )<br />
<br />
Oscillatory behavior: depending on the separation, ferromagnetic or antiferromagnetic<br />
Double exchange<br />
Some oxides (Magnetite <strong>and</strong> Manganite ( ≤ ≤ )) have<br />
ferromagnetic order<br />
Occurs where magnetic ion can show mixed valency<br />
Fe ↔ Fe <br />
Mn ↔ Mn
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