Dynamic Properties of the Impure Classical Heisenberg Chain
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概要
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The second, fourth, and sixth moments are calculated exactly of the dynamnclocal-moment pair correlation function for an impure classical Heisenberg chain,with nearest-nei#bor exchanue interactions, consistinn of two kinds of magneticions arransed randoml>'. Bv usins these moments and bv adortinn a four-roleapproximation, the neutron inelastic magnetic scattering cross section is formu-Rated. Numerical evaluations are r>erformed for (CD3)4NMIl1-,CU,C13 (TMMC:Cu). In the case of finite Cu" concentration, both a peak at finite frequency whichcorresponds to the spin wave excitation and that at zero frequency are obtainedin the cross section versus frequency curve calculated at low temperatures forwave numbers not near the center of the Brillouin zone. The results for the spinwave peak reproduce well qualitative features of the recent experimental data. Thecalculation shows that the spin wave peak for the imptu'e case disappears in thelimit of absolute zero temperature.
- 社団法人日本物理学会の論文
- 1979-11-15
著者
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Tonegawa Takashi
Department Of Physics Faculty Of Science Kobe University
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Tonegawa Takashi
Department Of Earth And Environmental Sciences Graduate School Of Environmental Studies Nagoya Unive
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TONEGAWA Takashi
Department of Physics,Faculty of Science,Kobe University
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