The paradoxical role played by the angular momentum conservation in magnetization dynamics

Jean-Eric Wegrowe; Henri-Jean Drouhin

doi:10.1117/12.893831

15 September 2011 The paradoxical role played by the angular momentum conservation in magnetization dynamics

Proceedings Volume 8100, Spintronics IV; 81000C (2011) https://doi.org/10.1117/12.893831
Event: SPIE NanoScience + Engineering, 2011, San Diego, California, United States

Abstract

The intimate relation between the angular momentum and the magnetization - expressed through the gyromagnetic relation - is well known and is easy to evidenced at the macroscopic scale with magnetomechanical measurements. On the other hand, the conservation of the angular momentum find also a simple illustration in the behavior of a spinning top. Accordingly, the dynamics of a single domain ferromagnet should follow the same laws as a symmetrical spinning top. Paradoxically, this is not true since the equations that govern the dynamics of the magnetization do not contain inertial terms. We investigate under what conditions the inertial terms that are initially present in the conservation laws disappear, in order to lead to the well-known expressions of the Landau-Lifshitz-Gilbert equation

Citation Download Citation

Jean-Eric Wegrowe and Henri-Jean Drouhin "The paradoxical role played by the angular momentum conservation in magnetization dynamics", Proc. SPIE 8100, Spintronics IV, 81000C (15 September 2011); https://doi.org/10.1117/12.893831

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