1949/01/01 by D. Polder · 6 citations
Engineering · Physics and Astronomy · #Geophysics and Sensor Technology #Crystallography and Radiation Phenomena
paper · doi:10.1080/14786444908561215
openalex publication_date 1949/01/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
Summary Kittel's classical theory of resonance in a magnetized ferromagnetic material is generalized; a phenomenological theory is obtained in which the dependence on the shape and the dimensions of the specimen no longer occurs. As an application the propagation of a plane electromagnetic (micro-) wave in a magnetized ferromagnetic medium is discussed. A quantum theory of the resonance phenomenon is given on the basis of a generalized Bloch spin-wave theory. An ambiguity in the use of the term gyro magnetic ratio is pointed out. It is suggested that the anomalous g-value found by resonance experiments may be explained by the combined effect of an electric crystal field and spin-orbit interaction.