Temperature dependence of the localized magnon mode in MnF2 : Co |
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| Authors: | U. Dürr K.J. Button |
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| Affiliation: | Francis Bitter National Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, U.S.A. |
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| Abstract: | The localized magnon mode in MnF2 : Co was studied by far infrared resonance techniques. The halfwidth at 8 K is 1 cm-1, about three times smaller than that obtained by other experimental methods. Therefore, accurate measurements of the temperature dependence are possible between 8 and 40 K. The temperature dependence of the effective g-factor is attributed to spin wave renormalization. The half width is magnetic field dependent at higher temperatures and can be approximated by a T2 law. |
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