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

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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.

Original languageEnglish
Title of host publicationSpintronics IV
DOIs
Publication statusPublished - 11 Oct 2011
Externally publishedYes
EventSpintronics IV - San Diego, CA, United States
Duration: 21 Aug 201124 Aug 2011

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8100
ISSN (Print)0277-786X

Conference

ConferenceSpintronics IV
Country/TerritoryUnited States
CitySan Diego, CA
Period21/08/1124/08/11

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