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|Title:||Far Infrared Optical Absorption in Manganese Fluoride|
|Keywords:||far infrared, optical, absorption, Manganese Fluoride, phonon|
|Abstract:||<p> The optical absorption in manganese fluoride has been studied in the range of 30 to 300 cm^-1 with emphasis placed on the possible multiple magnon absorptions (other than two-magnon) and an induced single magnon absorption. It is shown that theoretically one can expect four-magnon processes by expanding the Heisenberg spin hamiltonian to higher orders in the creation and annihilation operators introduced by the Holstein-Primakoff transformation. However, neither an induced one magnon nor four magnon process was observed. The absorptions which were seen in the spectra were attributed to phonon processes.</p>|
|Appears in Collections:||Open Access Dissertations and Theses|
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|Neimanis_John_1971May_Masters..pdf||1.41 MB||Adobe PDF||View/Open|
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