Details

Autor(en) / Beteiligte

• Andreev, P. A.
• Trukhanova, M. I.

Titel

Quantum Hydrodynamic Representation of the Exchange Interaction in the Theory of Description of Magnetically Ordered Media

Ist Teil von

• Moscow University physics bulletin, 2023-08, Vol.78 (4), p.445-452

Ort / Verlag

Moscow: Pleiades Publishing

Erscheinungsjahr

2023

Quelle

SpringerLink

Beschreibungen/Notizen

• Ferromagnetics, multiferroics, and other magnetically ordered materials are described by various models of magnetization evolution of the medium. In this work, we develop a many-particle quantum hydrodynamics method for such systems. We derive the evolution equation for macroscopic magnetization, corresponding to the nondissipative version of the Landau–Lifshitz equation for spin-1/2 particles, using the Heisenberg Hamiltonian. It is shown that the well-known form of the exchange interaction contribution in the Landau–Lifshitz equation arises at the third order in the interaction radius. The possibilities for systematic generalization of the obtained result are discussed when considering the fifth order or particles with a large spin.